In this task, you're given an ambiguous question (which can be answered in more than one way). Your task is to write a question that clarifies the given question in such a way that the generated question has one unique answer.
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Question: When did us get involved in vietnam war?

Answer: When did us get involved in vietnam war by sending supplies?


Question: Where does the umbilical vein enter the circulation of the fetus?

Answer: Where does less than a third of the blood from the umbilical vein enter the circulation of the fetus?


Question: Who have been the hosts of whose line is it anyway?

Answer:
Who has been the host of the American TV show Whose Line Is It Anyway from 1998 to 2007?