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.
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Question: Who invented the first curling iron in 1872?

Answer: Francois Marcel Grateau


Question: What size bullet does an ak 47 shoot?

Answer: 7.62 caliber 39mm rounds


Question: Who's the girl that plays 11 on stranger things?

Answer:
Millie Bobby Brown