In this task, you are given a sentence and a verb from the sentence. Your task is to generate a set of wh-questions starting with who, what, when, where, why, how, how much. The generated questions must contain the verb and the answers to these questions are phrases in the input sentence. The answer to the questions is associated with a specific semantic role. The answer to these questions is associated with a specific semantic role. The questions must use pronouns instead of direct nouns that could be used to refer to various roles present in the sentence. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is unique (iii) its answer is a continuous text span from the paragraph.

Q: Sentence: Losing Barbara caused Dick to become estranged from Bruce for his role . 
 Verb: losing

A: who was  lost?
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Q: Sentence: Losing Barbara caused Dick to become estranged from Bruce for his role . 
 Verb: caused

A: what   caused someone to do something?
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Q: Sentence: The second , at Mw 6.4 , occurred on February 24 , 2004 , killing more than 560 people . 
 Verb: occurred

A:
when did something occur?
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