Part 1. 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.
Part 2. Example
Question: How many times does Earth rotate on its axis in one day? 
Answer: once. 
Sentence: Earth rotate once on its axis, in one day.
Answer: One day is the amount of time that it takes for the Earth to rotate once on its axis.
Explanation: It is a good paraphrase as this can be used to answer the given question. Also, it contains several new words than the words present in the given sentence.
Part 3. Exercise
Question: Which of these takes about one year to complete? 
Answer: Earth to orbit the Sun. 
Sentence: It takes about one year for earth to orbit the sun.
Answer:
For the earth to go all of the way around the sun, it takes one year.