instruction:
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.
question:
Sentence: Estradiol causes the endometrium to thicken during a menstrual cycle. Question: What causes the endometrium to thicken during a menstrual cycle?
answer:
estradiol


question:
Sentence: The main function of the spleen is to filter the blood and remove unwanted red blood cells. Question: The main function of this organ is to filter the blood and remove unwanted red blood cells?
answer:
spleen


question:
Sentence: A hookworm is classified as a parasite. Question: A hookworm is classified as what type of organism?
answer:

parasite