In this task, you are given a fact statement and question based on the fact. Your task is to generate the correct answer for the question. The answer needs to be generated using the context fact statement.
--------
Question: Fact: cycles of day and night occur once per day. Question: cycles of day and night occur once per?

Answer: 86400 seconds


Question: Fact: ferrous metals contain iron. Question: Which would be the worst to wear out in a thunderstorm?

Answer: a medallion made of ferrous metals


Question: Fact: bacteria can cause people to become ill. Question: Which of the following could harbor unsafe bacteria?

Answer:
unwashed greens