TASK DEFINITION: In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
PROBLEM: Sentence: The thick skin, found only on the palms of the hands and the soles of the feet, has an extra layer. Question: The thick skin, found only on the palms of the hands and the soles of the feet, has an extra what?

SOLUTION: layer

PROBLEM: Sentence: Correlation is the comparison of two factors within a population. Question: What is the comparison of two factors within a population?

SOLUTION: correlation

PROBLEM: Sentence: Fruit fly and brine shrimp hox genes have evolved independently for 400 million years long. Question: Fruit fly and brine shrimp hox genes have evolved independently for how long?

SOLUTION:
400 million years