Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.

Q: Context : Herta Haas (29 March 1914 -- 5 March 2010) was a Yugoslav Partisan during World War II and the second wife of Josip Broz Tito, leader of the Partisans and a future President of Yugoslavia. 
Answer : Josip Broz Tito

A: What is Herta Haas's spouse's name?
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Q: Context : Wide Open West is privately owned, with Avista Capital Partners having a majority stake. 
Answer : Avista Capital Partners

A: What is Wide Open West's parent company?
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Q: Context : The M1 Abrams entered U.S. service in 1980, replacing the M60 tank. 
Answer : 1980

A:
In what year did M1 Abrams enter service?
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