Someone

class LabelSum(models.Model):
	content_type = models.ForeignKey(ContentType, db_index=True)
	object_id = models.PositiveIntegerField(db_index=True)

	phrase = models.ForeignKey(Phrase)
	count = models.PositiveIntegerField(default=0)

	class Meta:
		unique_together = (('content_type', 'object_id'),)
		verbose_name = _('label')
		verbose_name_plural = _('labels')

class Label(models.Model):
	phrase = models.ForeignKey(Phrase)
	
	user = models.ForeignKey(User, null=True, db_index=True)
	ip = models.IPAddressField()
	post_date = models.DateTimeField(auto_now=True, editable=False) 

	class Meta:
		unique_together = (('score', 'user'),)
		ordering = ['-post_date']
		verbose_name = _('vote')
		verbose_name_plural = _('votes')

class Phrase(models.Model):
	label = models.CharField(maxlength=100)