instruction:
Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
question:
What is the chemical, no what is a mechanical barrier in insects that protects the insect?
answer:
What is a mechanical barrier in insects that protects the insect?


question:
When did Tugh Temur find no wait I mean destroy his academy?
answer:
 When did Tugh Temur destroy his academy?


question:
After what American war no after what battle did Union forces return to and occupy Jacksonville for the rest of the war?
answer:
After what battle did Union forces return to and occupy Jacksonville for the rest of the war?