Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

[EX Q]: What concept did philosophers in antiquity use in the study of stationary and moving objects or rather to study simple machines?
[EX A]: What concept did philosophers in antiquity use to study simple machines?

[EX Q]: Who was unable to perform his duty hoo boy famous for disobedience against a tax collector?
[EX A]: Who was famous for disobedience against a tax collector?

[EX Q]: Which khanates had not converted to Buddhism ugh instead Islam?
[EX A]:
Which khanates had not converted to Islam?