TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: When were ctenophore mnemiopsis leidyi introduced into The Black Sea and the Sea of Azov ahh actually I want to know when were fish larvae accidentally introduced into the Black Sea?

SOLUTION: When were fish larvae introduced into the Black Sea accidentally?

PROBLEM: What helps or rather what are found in fossils?

SOLUTION: What are found in fossils?

PROBLEM: What is the name of the area that the Allston neighborhood no main campus is centered in Cambridge?

SOLUTION:
What is the name of the area that the main campus is centered in Cambridge?