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.

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

Passage: Fact 1- Daniel went back to the office. Fact 2- Mary went back to the hallway. Question: Where is Mary? Answer: hallway
Fact 2

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

Fact 8