Definition: Convert a disfluent question to a proper question. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.
Input: How much did the substantial endowments no the Groton School charge per student for tuition in 2012?

How much did the Groton School charge per student for tuition in 2012?