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: Electrophiles have a strong tendency to react with nucleophiles. Question: Electrophiles have a strong tendency to react with what?

SOLUTION: nucleophiles

PROBLEM: Sentence: Instead of heat, organisms use catalysis to speed up reactions. Question: Instead of heat, organisms use what to speed up reactions?

SOLUTION: catalysis

PROBLEM: Sentence: A glacier leaves behind bare rock when it retreats. Question: What does a glacier leave behind when it retreats?

SOLUTION:
bare rock