instruction:
In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
question:
Question: What occurs before the endometrium thickens in estrous cycles? Answer: ovulation
answer:
Ovulation occurs before the endometrium thickens in estrous cycles.


question:
Question: When food enters the stomach after a period of fasting, a drop in what initiates the conversion of pepsinogen to pepsin? Answer: ph
answer:
Ph food enters the stomach after a period of fasting, a drop in what initiates the conversion of pepsinogen to pepsin.


question:
Question: What do you call air flowing over earth’s surface? Answer: wind
answer:

You call air flowing over earth’s surface wind.