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: What year did they stop digging the Pannerdens canal no no tell me what do the Waal and the Nederrijn-Lek discharge through?

What do the Waal and the Nederrijn-Lek discharge throguh?