Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
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Question: Which tree belongs to the genus Betula?

Answer: birch


Question: Who wrote the novels 'Go Tell It On The Mountain' and 'Giovanni's Room'?

Answer: james baldwin


Question: Which 1930 film instantly catapulted Marlene Dietrich to international stardom?

Answer:
the blue angel