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 went to the bathroom. Fact 2- John moved to the office. Question: Where is John? Answer: office

A: Fact 2
****
Q: Passage: Fact 1- Mary moved to the bathroom. Fact 2- Sandra went to the hallway. Question: Where is Mary? Answer: bathroom

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

A:
Fact 9
****