Task: Paraphrasing
Input (English): Question: What happens when mammals raise their hair with tiny muscles in the skin? 
Answer: goosebumps. 
Sentence: Goosebumps happen(s) when mammals raise their hair with tiny muscles in the skin.
Output (English): Tiny muscles in the skin are responsible for causing a mammal's hair to raise, an episode we refer to as goosebumps.