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.

[Q]: Question: What do you call materials able to conduct electricity with 100% efficiency, meaning that no energy is lost during the electrical transmission? 
Answer: superconductors. 
Sentence: You call materials able to conduct electricity with 100% efficiency, meaning that no energy is lost during the electrical transmission, superconductors.
[A]: During the electrical transmission superconductors looses no energy, and hence those materials are able to conduct electricity with 100% efficiency.


[Q]: Question: What crucial role does beneficial fungi play? 
Answer: balance of ecosystems. 
Sentence: Beneficial fungi play a crucial role in balance of ecosystems.
[A]: A crucial part of the balancing of ecosystems is done by beneficial fungi.


[Q]: Question: What do metals start out as? 
Answer: ore. 
Sentence: Metals start out as ore.
[A]:
Metals are refined from the base material they start as, called ore.