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.

[EX Q]: Sentence: Estradiol causes the endometrium to thicken during a menstrual cycle. Question: What causes the endometrium to thicken during a menstrual cycle?
[EX A]: estradiol

[EX Q]: Sentence: A wall of rocks or concrete a called a groin. Question: What is a wall of rocks or concrete called?
[EX A]: groin

[EX Q]: Sentence: The chemical symbol of positive metal ion ion is written first in ionic compounds. Question: The chemical symbol of which ion is written first in ionic compounds?
[EX A]:
positive metal ion