diff --git a/backend/data_import/pipeline/label.py b/backend/data_import/pipeline/label.py
new file mode 100644
index 00000000..5e8113de
--- /dev/null
+++ b/backend/data_import/pipeline/label.py
@@ -0,0 +1,155 @@
+import abc
+import uuid
+from typing import Any, Optional
+
+import pydantic.error_wrappers
+from pydantic import UUID4, BaseModel, validator
+
+from .label_types import LabelTypes
+from examples.models import Example
+from label_types.models import CategoryType, LabelType, RelationType, SpanType
+from labels.models import Category as CategoryModel
+from labels.models import Label as LabelModel
+from labels.models import Relation as RelationModel
+from labels.models import Span as SpanModel
+from labels.models import TextLabel as TextLabelModel
+from projects.models import Project
+
+
+class Label(BaseModel, abc.ABC):
+    id: int = -1
+    uuid: UUID4
+    example_uuid: UUID4
+
+    def __init__(self, **data):
+        data["uuid"] = uuid.uuid4()
+        super().__init__(**data)
+
+    @abc.abstractmethod
+    def __lt__(self, other):
+        raise NotImplementedError()
+
+    @classmethod
+    def parse(cls, example_uuid: UUID4, obj: Any):
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def create_type(self, project: Project) -> Optional[LabelType]:
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def create(self, user, example: Example, types: LabelTypes, **kwargs) -> LabelModel:
+        raise NotImplementedError
+
+    def __hash__(self):
+        return hash(tuple(self.dict()))
+
+
+class CategoryLabel(Label):
+    label: str
+
+    def __lt__(self, other):
+        return self.label < other.label
+
+    @validator("label")
+    def label_is_not_empty(cls, value: str):
+        if value:
+            return value
+        else:
+            raise ValueError("is not empty.")
+
+    @classmethod
+    def parse(cls, example_uuid: UUID4, obj: Any):
+        try:
+            return cls(example_uuid=example_uuid, label=obj)
+        except pydantic.error_wrappers.ValidationError:
+            return None
+
+    def create_type(self, project: Project) -> Optional[LabelType]:
+        return CategoryType(text=self.label, project=project)
+
+    def create(self, user, example: Example, types: LabelTypes, **kwargs):
+        return CategoryModel(uuid=self.uuid, user=user, example=example, label=types.get_by_text(self.label))
+
+
+class SpanLabel(Label):
+    label: str
+    start_offset: int
+    end_offset: int
+
+    def __lt__(self, other):
+        return self.start_offset < other.start_offset
+
+    @classmethod
+    def parse(cls, example_uuid: UUID4, obj: Any):
+        try:
+            if isinstance(obj, list) or isinstance(obj, tuple):
+                columns = ["start_offset", "end_offset", "label"]
+                obj = zip(columns, obj)
+                return cls(example_uuid=example_uuid, **dict(obj))
+            elif isinstance(obj, dict):
+                return cls(example_uuid=example_uuid, **obj)
+        except pydantic.error_wrappers.ValidationError:
+            return None
+
+    def create_type(self, project: Project) -> Optional[LabelType]:
+        return SpanType(text=self.label, project=project)
+
+    def create(self, user, example: Example, types: LabelTypes, **kwargs):
+        return SpanModel(
+            uuid=self.uuid,
+            user=user,
+            example=example,
+            start_offset=self.start_offset,
+            end_offset=self.end_offset,
+            label=types.get_by_text(self.label),
+        )
+
+
+class TextLabel(Label):
+    text: str
+
+    def __lt__(self, other):
+        return self.text < other.text
+
+    @classmethod
+    def parse(cls, example_uuid: UUID4, obj: Any):
+        try:
+            return cls(example_uuid=example_uuid, text=obj)
+        except pydantic.error_wrappers.ValidationError:
+            return None
+
+    def create_type(self, project: Project) -> Optional[LabelType]:
+        return None
+
+    def create(self, user, example: Example, types: LabelTypes, **kwargs):
+        return TextLabelModel(uuid=self.uuid, user=user, example=example, text=self.text)
+
+
+class RelationLabel(Label):
+    from_id: int
+    to_id: int
+    type: str
+
+    def __lt__(self, other):
+        return self.from_id < other.from_id
+
+    @classmethod
+    def parse(cls, example_uuid: UUID4, obj: Any):
+        try:
+            return cls(example_uuid=example_uuid, **obj)
+        except pydantic.error_wrappers.ValidationError:
+            return None
+
+    def create_type(self, project: Project) -> Optional[LabelType]:
+        return RelationType(text=self.type, project=project)
+
+    def create(self, user, example: Example, types: LabelTypes, **kwargs):
+        return RelationModel(
+            uuid=self.uuid,
+            user=user,
+            example=example,
+            type=types.get_by_text(self.type),
+            from_id=kwargs["id_to_span"][self.from_id],
+            to_id=kwargs["id_to_span"][self.to_id],
+        )
diff --git a/backend/data_import/tests/test_label.py b/backend/data_import/tests/test_label.py
new file mode 100644
index 00000000..a68efd4e
--- /dev/null
+++ b/backend/data_import/tests/test_label.py
@@ -0,0 +1,169 @@
+import uuid
+from unittest.mock import MagicMock
+
+from django.test import TestCase
+from model_mommy import mommy
+
+from data_import.pipeline.label import (
+    CategoryLabel,
+    RelationLabel,
+    SpanLabel,
+    TextLabel,
+)
+from label_types.models import CategoryType, RelationType, SpanType
+from labels.models import Category as CategoryModel
+from labels.models import Relation as RelationModel
+from labels.models import Span as SpanModel
+from labels.models import TextLabel as TextModel
+from projects.models import DOCUMENT_CLASSIFICATION, SEQ2SEQ, SEQUENCE_LABELING
+from projects.tests.utils import prepare_project
+
+
+class TestLabel(TestCase):
+    task = "Any"
+
+    def setUp(self):
+        self.project = prepare_project(self.task)
+        self.user = self.project.admin
+        self.example = mommy.make("Example", project=self.project.item)
+
+
+class TestCategoryLabel(TestLabel):
+    task = DOCUMENT_CLASSIFICATION
+
+    def test_comparison(self):
+        category1 = CategoryLabel(label="A", example_uuid=uuid.uuid4())
+        category2 = CategoryLabel(label="B", example_uuid=uuid.uuid4())
+        self.assertLess(category1, category2)
+
+    def test_empty_label_raises_value_error(self):
+        with self.assertRaises(ValueError):
+            CategoryLabel(label="", example_uuid=uuid.uuid4())
+
+    def test_parse(self):
+        example_uuid = uuid.uuid4()
+        category = CategoryLabel.parse(example_uuid, obj="A")
+        self.assertEqual(category.label, "A")
+        self.assertEqual(category.example_uuid, example_uuid)
+
+    def test_create_type(self):
+        category = CategoryLabel(label="A", example_uuid=uuid.uuid4())
+        category_type = category.create_type(self.project.item)
+        self.assertIsInstance(category_type, CategoryType)
+        self.assertEqual(category_type.text, "A")
+
+    def test_create(self):
+        category = CategoryLabel(label="A", example_uuid=uuid.uuid4())
+        types = MagicMock()
+        types.get_by_text.return_value = mommy.make(CategoryType, project=self.project.item)
+        category_model = category.create(self.user, self.example, types)
+        self.assertIsInstance(category_model, CategoryModel)
+
+
+class TestSpanLabel(TestLabel):
+    task = SEQUENCE_LABELING
+
+    def test_comparison(self):
+        span1 = SpanLabel(label="A", start_offset=0, end_offset=1, example_uuid=uuid.uuid4())
+        span2 = SpanLabel(label="A", start_offset=1, end_offset=1, example_uuid=uuid.uuid4())
+        self.assertLess(span1, span2)
+
+    def test_parse_tuple(self):
+        example_uuid = uuid.uuid4()
+        span = SpanLabel.parse(example_uuid, obj=(0, 1, "A"))
+        self.assertEqual(span.label, "A")
+        self.assertEqual(span.start_offset, 0)
+        self.assertEqual(span.end_offset, 1)
+
+    def test_parse_dict(self):
+        example_uuid = uuid.uuid4()
+        span = SpanLabel.parse(example_uuid, obj={"label": "A", "start_offset": 0, "end_offset": 1})
+        self.assertEqual(span.label, "A")
+        self.assertEqual(span.start_offset, 0)
+        self.assertEqual(span.end_offset, 1)
+
+    def test_parse_invalid_dict(self):
+        example_uuid = uuid.uuid4()
+        span = SpanLabel.parse(example_uuid, obj={"label": "A", "start_offset": 0})
+        self.assertEqual(span, None)
+
+    def test_create_type(self):
+        span = SpanLabel(label="A", start_offset=0, end_offset=1, example_uuid=uuid.uuid4())
+        span_type = span.create_type(self.project.item)
+        self.assertIsInstance(span_type, SpanType)
+        self.assertEqual(span_type.text, "A")
+
+    def test_create(self):
+        span = SpanLabel(label="A", start_offset=0, end_offset=1, example_uuid=uuid.uuid4())
+        types = MagicMock()
+        types.get_by_text.return_value = mommy.make(SpanType, project=self.project.item)
+        span_model = span.create(self.user, self.example, types)
+        self.assertIsInstance(span_model, SpanModel)
+
+
+class TestTextLabel(TestLabel):
+    task = SEQ2SEQ
+
+    def test_comparison(self):
+        text1 = TextLabel(text="A", example_uuid=uuid.uuid4())
+        text2 = TextLabel(text="B", example_uuid=uuid.uuid4())
+        self.assertLess(text1, text2)
+
+    def test_parse(self):
+        example_uuid = uuid.uuid4()
+        text = TextLabel.parse(example_uuid, obj="A")
+        self.assertEqual(text.text, "A")
+
+    def test_parse_invalid_data(self):
+        example_uuid = uuid.uuid4()
+        text = TextLabel.parse(example_uuid, obj=[])
+        self.assertEqual(text, None)
+
+    def test_create_type(self):
+        text = TextLabel(text="A", example_uuid=uuid.uuid4())
+        text_type = text.create_type(self.project.item)
+        self.assertEqual(text_type, None)
+
+    def test_create(self):
+        text = TextLabel(text="A", example_uuid=uuid.uuid4())
+        types = MagicMock()
+        text_model = text.create(self.user, self.example, types)
+        self.assertIsInstance(text_model, TextModel)
+
+
+class TestRelationLabel(TestLabel):
+    task = SEQUENCE_LABELING
+
+    def test_comparison(self):
+        relation1 = RelationLabel(type="A", from_id=0, to_id=1, example_uuid=uuid.uuid4())
+        relation2 = RelationLabel(type="A", from_id=1, to_id=1, example_uuid=uuid.uuid4())
+        self.assertLess(relation1, relation2)
+
+    def test_parse(self):
+        example_uuid = uuid.uuid4()
+        relation = RelationLabel.parse(example_uuid, obj={"type": "A", "from_id": 0, "to_id": 1})
+        self.assertEqual(relation.type, "A")
+        self.assertEqual(relation.from_id, 0)
+        self.assertEqual(relation.to_id, 1)
+
+    def test_parse_invalid_data(self):
+        example_uuid = uuid.uuid4()
+        relation = RelationLabel.parse(example_uuid, obj={"type": "A", "from_id": 0})
+        self.assertEqual(relation, None)
+
+    def test_create_type(self):
+        relation = RelationLabel(type="A", from_id=0, to_id=1, example_uuid=uuid.uuid4())
+        relation_type = relation.create_type(self.project.item)
+        self.assertIsInstance(relation_type, RelationType)
+        self.assertEqual(relation_type.text, "A")
+
+    def test_create(self):
+        relation = RelationLabel(type="A", from_id=0, to_id=1, example_uuid=uuid.uuid4())
+        types = MagicMock()
+        types.get_by_text.return_value = mommy.make(RelationType, project=self.project.item)
+        id_to_span = {
+            0: mommy.make(SpanModel, start_offset=0, end_offset=1),
+            1: mommy.make(SpanModel, start_offset=2, end_offset=3),
+        }
+        relation_model = relation.create(self.user, self.example, types, id_to_span=id_to_span)
+        self.assertIsInstance(relation_model, RelationModel)