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 : William George Bock (born June 11, 1884 in Port Elgin, Ontario, Canada-died 1973) was a Canadian politician and farmer.
Answer : 1973

A: What year did William George Bock die?
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Q: Context : Henry Baldwin Harrison (September 11, 1821 - October 29, 1901) was a Republican politician and the 52nd Governor of Connecticut.
Answer : politician

A: What kind of occupation does Henry Baldwin Harrison have?
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Q: Context : The Salonika Agreement (also called the Thessaloniki Accord) was a treaty signed on 31 July 1938 between Bulgaria on the one hand and the Balkan Entente--the states of Greece, Romania, Turkey and Yugoslavia--on the other.
Answer : 31 July 1938

A:
What is the date when Salonika Agreement happened?
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