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

[EX Q]: What combined with rising rather lowering prices to make it difficult or impossible for poor people to keep pace?
[EX A]: What combined with lowering prices to make it difficult or impossible for poor people to keep pace?

[EX Q]: How many projects a year does no wait the Warsaw Gallery Weekend is held when?
[EX A]: When is the Warsaw Gallery Weekend held?

[EX Q]: The lithosphere moves over what or rather which mantle in the theory of plate tectonics?
[EX A]:
The lithosphere moves over which mantle n the theory of plate tectonics?