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

Ex Input:
What is the longest um no the shortest river in Germany?

Ex Output:
What is the shortest river in Germany?

Ex Input:
How many er which plateau is the left part of Vistula on?

Ex Output:
Which plateau is the left part of Vistula on?

Ex Input:
Why has or uh what was a major failure, especially in the building of Warsaw?

Ex Output:
What was a major failure, especially in the building of Warsaw?