instruction:
Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
question:
Wht do rock units what happens deeper in the earth I mean under what type of compression do they become thicker and shorten?
answer:
Rock units become thicker and shorten when placed under this type of compression. 


question:
What specific groups are found within the African-American population, I take that back, the Mexican-American population?
answer:
What specific groups are found within the Mexican-American population?


question:
How many natural or rather the number of lakes in Warsaw?
answer:
How many lakes are there in Warsaw?