You will be given a passage with an enumerated set of facts, a question of form 'Where is <person_name>?', and its answer. The task is to identify a supporting fact that is necessary to answer the question. The output would be the corresponding fact number.

Q: Passage: Fact 1- John journeyed to the bedroom. Fact 2- Daniel moved to the office. Question: Where is Daniel? Answer: office

A: Fact 2
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Q: Passage: Fact 1- Mary travelled to the hallway. Fact 2- Mary moved to the garden. Question: Where is Mary? Answer: garden

A: Fact 2
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Q: Passage: Fact 1- Mary journeyed to the bedroom. Fact 2- Mary journeyed to the garden. Fact 3- Daniel went back to the garden. Fact 4- Mary went back to the hallway. Fact 5- Daniel went to the hallway. Fact 6- John travelled to the bedroom. Question: Where is Mary? Answer: hallway

A:
Fact 4
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