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

In the layered model of the Earth, the mantle has two layers above it. What are they no sorry it has two layers belows it, what are they?
In the layered model of the Earth, the mantle has two layers below it. What are they? 

The function of long-lived memory cells is an example of which or no make that what kind of immune response?
The function of long-lived memory cells is an example of what kind of immune response?

Who was the leader of the Turabi no the Islamist regime in Sudan?
Who was the leader of the Islamist regime in Sudan?