TASK DEFINITION: You are given a question, its answer, and a sentence that supports the question, i.e., the answer to the question is inferable from the sentence. In this task, you need to paraphrase the given sentence so that the paraphrased sentence still supports the question i.e. you can still infer the answer to the question from the paraphrased sentence. Do not write a paraphrase with a minor change in the given sentence e.g. replacing the word "one" with "a". Instead, try to write a paraphrase that contains new words, i.e. the words that are not present in the input sentence.
PROBLEM: Question: What do metals start out as? 
Answer: ore. 
Sentence: Metals start out as ore.

SOLUTION: Metals are refined from the base material they start as, called ore.

PROBLEM: Question: Which two environmental changes usually cause certain animals to migrate? 
Answer: change of season and less food. 
Sentence: A change of season and less food usually cause certain animals to migrate.

SOLUTION: A change of season or less food causes some animals to migrate.

PROBLEM: Question: When exposed to ultraviolet, some substances, such as minerals, glow in characteristic visible wavelengths, a process called this? 
Answer: fluorescence. 
Sentence: When exposed to ultraviolet, some substances, such as minerals, glow in characteristic visible wavelengths, in a process called fluorescence.

SOLUTION:
During the process of fluorescence, minerals and some substances begin to glow in characteristic visible wavelengths after exposed to ultraviolet.