TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: What is the longest um no the shortest river in Germany?

SOLUTION: What is the shortest river in Germany?

PROBLEM: What organization was led by I mean defeated by Hasan al-Hudaybi?

SOLUTION:  What organization was defeated by Hasan al-Hudaybi?

PROBLEM: What was the projection of sea level did the IPCC understate no increases in the fourth assessment report?

SOLUTION:
What was the projection of sea level increases in the forth assessment report?