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 went back to the office. Fact 2- John went back to the bathroom. Fact 3- John went to the hallway. Fact 4- Mary journeyed to the hallway. Fact 5- Sandra travelled to the hallway. Fact 6- Mary travelled to the office. Fact 7- Mary went back to the hallway. Fact 8- Sandra travelled to the office. Fact 9- John went to the kitchen. Fact 10- Sandra went to the hallway. Question: Where is Mary? Answer: hallway

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

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

A:
Fact 4
****