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- Sandra moved to the office. Fact 2- Mary went back to the bathroom. Fact 3- Mary travelled to the office. Fact 4- Sandra moved to the kitchen. Question: Where is Mary? Answer: office

A: Fact 3
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Q: Passage: Fact 1- John went to the bathroom. Fact 2- John moved to the office. Fact 3- John went to the hallway. Fact 4- Sandra journeyed to the hallway. Question: Where is John? Answer: hallway

A: Fact 3
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Q: Passage: Fact 1- Daniel moved to the garden. Fact 2- Sandra moved to the hallway. Question: Where is Sandra? Answer: hallway

A:
Fact 2
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