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: A nonsurgical alternative involves the use of a miotic to constrict the pupil and prevent the lens from luxating into the anterior chamber . 
 Verb: prevent
[A]: what   prevents something?


[Q]: Sentence: The album is named after the discredited pseudoscience of phrenology , the study of head shapes to determine intelligence and character , which was used to rationalize racism during the 19th century in the United States . 
 Verb: rationalize
[A]: what was  rationalized?


[Q]: Sentence: Debate surrounding a volkstaat returned to the mainstream media following the murder of AWB leader Eugene Terre'Blanche in April 2010 . 
 Verb: following
[A]:
what was  followed  by something?