instruction:
In this task, you are given a question. You have to answer the question based on your information.
question:
Which pizza chain, Cassano's Pizza King or Mazzio's is still in operation today?
answer:
Cassano's Pizza King


question:
What 2012 American musical drama television series, produced by R. J. Cutler, has a discography where all of the actors who portray singing characters perform their own vocals?
answer:
Nashville


question:
How many copies of the books by the author of The Leopard have sold worldwide?
answer:

30 million