Given a question, generate a paraphrase of that question wihout changing the meaning of it. Your answer should reword the given sentence, but not add information to it or remove information from it. The answer to your question should be the same as the answer to the original question.

Ex Input:
Question: what was barack obama before he became the president?

Ex Output:
what did barack obama do before he became a president?


Ex Input:
Question: what is north las vegas population?

Ex Output:
what is the population of north las vegas nevada?


Ex Input:
Question: what are the four countries of north america?

Ex Output:

what countries comprise north america?