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- John journeyed to the garden. Fact 2- John travelled to the office. Fact 3- Mary travelled to the hallway. Fact 4- John journeyed to the bedroom. Question: Where is John? Answer: bedroom
Fact 4

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

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

Fact 8