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 chemical, no what is a mechanical barrier in insects that protects the insect?

SOLUTION: What is a mechanical barrier in insects that protects the insect?

PROBLEM: What civilization did the pottery belong to no sorry I'm wondering what is the 16th century known as the start of?

SOLUTION: What is the 16th century known as the start of?

PROBLEM: How many people per square mile lived in Fresno in 1970 no no 2010 rather?

SOLUTION:
How many people per square mile lived in Fresno in 2010?