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: Lichens are not a single organism, but rather an example of a mutualism. Question: Lichens are not a single organism, but rather an example of a what?

SOLUTION: mutualism

PROBLEM: Sentence: Mountain building and earthquakes are some of the responses of rocks when subected to stress. Question: Mountain building and earthquakes are some of the responses of rocks when subected to what?

SOLUTION: stress

PROBLEM: Sentence: A plane mirror has a flat reflective surface and forms only virtual images. Question: A plane mirror has a flat reflective surface and forms only which kind of images?

SOLUTION:
virtual