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- Mary journeyed to the office. Fact 2- Daniel journeyed to the bedroom. Question: Where is Daniel? Answer: bedroom

A: Fact 2
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Q: Passage: Fact 1- Mary went back to the bedroom. Fact 2- Mary travelled to the garden. Question: Where is Mary? Answer: garden

A: Fact 2
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Q: Passage: Fact 1- John travelled to the bathroom. Fact 2- Sandra went to the kitchen. Fact 3- Daniel went to the garden. Fact 4- Mary moved to the bedroom. Fact 5- Sandra moved to the bathroom. Fact 6- John moved to the hallway. Fact 7- John went back to the kitchen. Fact 8- Daniel journeyed to the hallway. Fact 9- Daniel went back to the office. Fact 10- Sandra went back to the hallway. Question: Where is John? Answer: kitchen

A:
Fact 7
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