Combing and sorting two querysets from different tables?
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I have two querysets that I would like to combine and sort.

Here are my queries:

`latestbooks = Book.objects.all().order_by('-added')`
`latestvideos = Video.objects.all().order_by('-added')`

I would like to combine these queries and sort them prior to passing them to my template so that I can create a list that shows the latest activity on the site -- whether it be a new book or new video in the order they were added in.
