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: Anaerobic respiration occurs if oxygen cannot be obtained at a sufficient rate. Question: What occurs if oxygen cannot be obtained at a sufficient rate?

SOLUTION: anaerobic respiration

PROBLEM: Sentence: Terrestrial biomes are classified by climatic factors and types of primary producers. Question: What are classified by climatic factors and types of primary producers?

SOLUTION: terrestrial biomes

PROBLEM: Sentence: When the core of a star begins to run low on hydrogen, it contracts. Question: What happens to the core of a star when it begins to run low on hydrogen?

SOLUTION:
it contracts