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

[EX Q]: What can or no make that where can a tribute to the fall of Katyn be found?
[EX A]: Where can a tribute to the fall of Katyn be found?

[EX Q]: What antigens do Helper T cells not recognize no sorry what co-receptor recruits molecules inside the T cell that are responsible for cell activation?
[EX A]: What co-receptor recruits molecules inside the T cell that are responsible for cell activation?

[EX Q]: Which is er how many non-Muslim empires have used imperialism?
[EX A]:
How many non-Muslim empires have used imperialism?