TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: How many soldiers no Khitan Tumens were there?

SOLUTION: How many Khitan Tumens were there?

PROBLEM: Tymnet utilize no um consisted of a large private network that supported who?

SOLUTION: Tymnet consisted of a large private network that supported who?

PROBLEM: What problem did some graphs showing 12 proxy based temperature what problem did some tree ring data have?

SOLUTION:
What problem did some tree ring data have?