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

[Q]: Where does the Rhine begin or no I mean end?
[A]: Where does the Rhine end?


[Q]: Who were later Yuan emperors isolated um what problems did the Yuan dynasty have near its end?
[A]: What problems did the Yuan dynasty have near its end?


[Q]: What is another method no word for the study of past and current life?
[A]:
What is another word for the study of past and current life?