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 Q]: Question: who took obamas place as illinois senator?
[EX A]: who replaced obama as a senator in illinois?

[EX Q]: Question: in what year did canada join the united nations?
[EX A]: what did canada join the united nations?

[EX Q]: Question: when did mark zuckerburg invent facebook?
[EX A]:
what year did mark zuckerberg invent facebook?