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

Input: Consider Input: When did Goldbach or wait Landau propose his four conjectural problems?

Output: When did Landau propose his four conjectural problems?


Input: Consider Input: What cultures were part of Jurchens' umm Kublai's administration?

Output: What cultures were part of Kublai's administration?


Input: Consider Input: Who went to Radcliffe and was trained there as students in its early days no scratch that and tell me who was President of Radcliffe from 1869-1909?
Output: Who was President of Radcliffe from 1869-1909?