In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.
--------
Question: Who published the moscow mathematical papyrus in 1930?

Answer: Struve, Vasilij Vasil'evič, and Boris Turaev


Question: Where are sister chromatids attached to one another?

Answer: common centromere


Question: Where did rub a dub dub come from?

Answer:
England