new_contents: from django.db import models
  
  # Create your models here.
  class Author(models.Model):
      author_last = models.CharField(max_length=200, blank=True, null=True)
      author_first = models.CharField(max_length=200)
      author_middle = models.CharField(max_length=200, blank=True, null=True)
      def __str__(self):
      	string_name = self.author_first
      	if self.author_middle is not None:
      		middle_name = self.author_middle
      		if len(middle_name) == 1:
      			middle_name = middle_name + '.'
      		string_name = string_name + " " + middle_name
      	if self.author_last is not None:
      		string_name = string_name + " " + self.author_last
  		return string_name
  
  class SourceType(models.Model):
      name = models.CharField(max_length=200)
      def __str__(self):              # __unicode__ on Python 2
  		return self.name
  
  class QuoteGenre(models.Model):
      name = models.CharField(max_length=200)
      def __str__(self):              # __unicode__ on Python 2
  		return self.name
subject: add quotes models (authors, source_types, and quote_genres)