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: biofuel is used to produce electricity by burning. Question: An example of biofuel could be?

Answer: leaves


Question: Fact: the excretory system removes waste from the body. Question: The excretory system removes waste from what?

Answer: persons insides


Question: Fact: planets orbit stars. Question: What entity does the earth orbit that causes the seasons to change?

Answer:
plasma star