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.

Question: Which of these can be mined from Earth and used as an energy source? 
Answer: Coal. 
Sentence: Coal of these can be mined from Earth and used as an energy source.
Coal can be mined from earth to use as an energy source.

Question: All types of cells are enclosed by what? 
Answer: membrane. 
Sentence: All types of cells are enclosed by a membrane.
A membrane every type of cell there is.

Question: Gabbro is a dark dense rock that can be found in what? 
Answer: oceanic crust. 
Sentence: Gabbro is a dark dense rock that can be found in the oceanic crust.

A dark dense rock called Gabbro can be found in the oceanic crust.