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: Heat transfer by conduction occurs when molecules? 
Answer: collide with other molecules. 
Sentence: Heat transfer by conduction occurs molecules collide with other molecules.
Conduction is a form of heat transfer that takes place when it comes into contact with matter , the atoms and molecules move and they in turn collide with other atoms or molecules so the heat is transferred, making them move too.

Question: Which of the following is true regarding the properties of an air mass? 
Answer: An air mass has similar temperature and moisture properties throughout it. 
Sentence: One of the properties of an air mass is that an air mass has similar temperature and moisture properties throughout it.
Air mass has a property throughout it.  That property is similar temperature and moisture.

Question: Which of the following statements best describes a complex machine? 
Answer: It is made of more than one simple machine. 
Sentence: A complex machine is described by: it is made of more than one simple machine.

A complex machine by its nature is composed of multiple simple machines.