TASK DEFINITION: Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.
PROBLEM: Who is no what famous conductor went to Harvard?

SOLUTION: What famous conductor went to Harvard?

PROBLEM: Where rather who was one of the most famous people born in Warsaw?

SOLUTION: Who was one of the most famous people born in Warsaw?

PROBLEM: How many years have annexing or no make that have imperialistic practices existed?

SOLUTION:
How many years have imperialistic practices existed?