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diff --git a/parts/django/tests/modeltests/many_to_many/models.py b/parts/django/tests/modeltests/many_to_many/models.py
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+++ b/parts/django/tests/modeltests/many_to_many/models.py
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+"""
+5. Many-to-many relationships
+
+To define a many-to-many relationship, use ``ManyToManyField()``.
+
+In this example, an ``Article`` can be published in multiple ``Publication``
+objects, and a ``Publication`` has multiple ``Article`` objects.
+"""
+
+from django.db import models
+
+class Publication(models.Model):
+    title = models.CharField(max_length=30)
+
+    def __unicode__(self):
+        return self.title
+
+    class Meta:
+        ordering = ('title',)
+
+class Article(models.Model):
+    headline = models.CharField(max_length=100)
+    publications = models.ManyToManyField(Publication)
+
+    def __unicode__(self):
+        return self.headline
+
+    class Meta:
+        ordering = ('headline',)