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.

Sentence: Excessive bending stress usually causes fractures on a bone. Question: What usually causes fractures on a bone?
excessive bending stress

Sentence: Animals need plants for food and energy. Question: Animals need plants for food and?
energy

Sentence: Exchange of dna segments happens between non-sister chromatids of homologous chromosomes during crossing-over. Question: When does exchange of dna segments happen between non-sister chromatids of homologous chromosomes?

during crossing-over