Generate a correct and concise answer for the question based on the words in the context.
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Question: Context : ''Intro to Knots'' is the tenth episode of the fourth season of the NBC sitcom Community, which originally aired on April 18, 2013.
Question : Which series is Intro to Knots apart of?

Answer: Community

Question: Context : All-Consuming Fire is an original novel written by Andy Lane and based on the long-running British science fiction television series Doctor Who.
Question : Which is the basis of All-Consuming Fire?

Answer: Doctor Who

Question: Context : The Madonna Litta is a late 15th-century painting, traditionally attributed to Leonardo da Vinci, in the Hermitage Museum, Saint Petersburg.
Question : What is the name of the place where Madonna Litta can be found?

Answer:
Hermitage Museum