Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

[EX Q]: What British mathematician took pride in doing work that he felt had no cryptography benefit, no no sorry, mathematical?
[EX A]: What British mathematician took pride in doing work that he felt had no mathematical benefit?

[EX Q]: When did Why did Vilnius become the capital of the Commonwealth?
[EX A]: Why did Vilnius become the capital of the Commonwealth?

[EX Q]: In what century did branches Waal and Nederrijn-Lek um the North Sea discharge into the Nederrijn river?
[EX A]:
In what century did the North Sea discharge into the Nederrijn river?