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- Daniel travelled to the garden. Fact 2- Mary went back to the kitchen. Question: Where is Mary? Answer: kitchen

A: Fact 2
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Q: Passage: Fact 1- John travelled to the bathroom. Fact 2- Sandra moved to the hallway. Fact 3- Daniel travelled to the kitchen. Fact 4- Daniel travelled to the hallway. Fact 5- John moved to the hallway. Fact 6- Mary went to the hallway. Question: Where is Daniel? Answer: hallway

A: Fact 4
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Q: Passage: Fact 1- Sandra went to the kitchen. Fact 2- Mary moved to the kitchen. Fact 3- Sandra moved to the hallway. Fact 4- Mary went to the office. Fact 5- Daniel journeyed to the garden. Fact 6- Sandra journeyed to the garden. Question: Where is Mary? Answer: office

A:
Fact 4
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