diff --git a/docs/index.rst b/docs/index.rst
index 38a12478ae0ba..f504faaa572ee 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -156,6 +156,7 @@
   language-usage
   Client <language-client>
   language-document
+  language-responses
 
 .. toctree::
   :maxdepth: 0
diff --git a/docs/language-responses.rst b/docs/language-responses.rst
new file mode 100644
index 0000000000000..ee6b30e9f3b3b
--- /dev/null
+++ b/docs/language-responses.rst
@@ -0,0 +1,9 @@
+Natural Language Response Classes
+=================================
+
+Entity
+~~~~~~
+
+.. automodule:: gcloud.language.entity
+  :members:
+  :show-inheritance:
diff --git a/gcloud/language/entity.py b/gcloud/language/entity.py
new file mode 100644
index 0000000000000..2c4a16648b257
--- /dev/null
+++ b/gcloud/language/entity.py
@@ -0,0 +1,84 @@
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Definition for Google Cloud Natural Language API entities.
+
+An entity is used to describe a proper name extracted from text.
+"""
+
+
+class EntityType(object):
+    """List of possible entity types."""
+
+    UNKNOWN = 'UNKNOWN'
+    """Unknown entity type."""
+
+    PERSON = 'PERSON'
+    """Person entity type."""
+
+    LOCATION = 'LOCATION'
+    """Location entity type."""
+
+    ORGANIZATION = 'ORGANIZATION'
+    """Organization entity type."""
+
+    EVENT = 'EVENT'
+    """Event entity type."""
+
+    WORK_OF_ART = 'WORK_OF_ART'
+    """Work of art entity type."""
+
+    CONSUMER_GOOD = 'CONSUMER_GOOD'
+    """Consumer good entity type."""
+
+    OTHER = 'OTHER'
+    """Other entity type (i.e. known but not classified)."""
+
+
+
+class Entity(object):
+    """A Google Cloud Natural Language API entity.
+
+    Represents a phrase in text that is a known entity, such as a person,
+    an organization, or location. The API associates information, such as
+    salience and mentions, with entities.
+
+    See:
+    https://cloud.google.com/natural-language/reference/rest/v1beta1/Entity
+
+    :type name: str
+    :param name: The name / phrase identified as the entity.
+
+    :type entity_type: str
+    :param entity_type: The type of the entity. See
+                        https://cloud.google.com/natural-language/\
+                        reference/rest/v1beta1/Entity#Type
+
+    :type metadata: dict
+    :param metadata: The metadata associated with the entity.
+
+    :type salience: float
+    :param salience: The prominence of the entity / phrase within the text
+                     containing it.
+
+    :type mentions: list
+    :param mentions: List of strings that mention the entity.
+    """
+
+    def __init__(self, name, entity_type, metadata, salience, mentions):
+        self.name = name
+        self.entity_type = entity_type
+        self.metadata = metadata
+        self.salience = salience
+        self.mentions = mentions
diff --git a/gcloud/language/test_entity.py b/gcloud/language/test_entity.py
new file mode 100644
index 0000000000000..3ba644669de1e
--- /dev/null
+++ b/gcloud/language/test_entity.py
@@ -0,0 +1,39 @@
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+
+
+class TestEntity(unittest.TestCase):
+
+    def _getTargetClass(self):
+        from gcloud.language.entity import Entity
+        return Entity
+
+    def _makeOne(self, *args, **kw):
+        return self._getTargetClass()(*args, **kw)
+
+    def test_constructor_defaults(self):
+        name = 'Italian'
+        entity_type = 'LOCATION'
+        metadata = {'wikipedia_url': 'http://en.wikipedia.org/wiki/Italy'}
+        salience = 0.19960518
+        mentions = ['Italian']
+        entity = self._makeOne(name, entity_type, metadata,
+                               salience, mentions)
+        self.assertEqual(entity.name, name)
+        self.assertEqual(entity.entity_type, entity_type)
+        self.assertEqual(entity.metadata, metadata)
+        self.assertEqual(entity.salience, salience)
+        self.assertEqual(entity.mentions, mentions)