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.

Example Input: Sentence: During the anaphase phase, sister chromatids separate and the centromeres divide. Question: During which phase do sister chromatids separate and the centromeres divide?
Example Output: anaphase

Example Input: Sentence: Beta decay occurs when an unstable nucleus emits a beta particle and energy. Question: What occurs when an unstable nucleus emits a beta particle and energy?
Example Output: beta decay

Example Input: Sentence: Nuclear symbols are used to write nuclear equations for radioactive decay. Question: What are used to write nuclear equations for radioactive decay?
Example Output:
nuclear symbols

