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 travelled to the kitchen. Fact 2- Daniel journeyed to the garden. Fact 3- John journeyed to the office. Fact 4- John travelled to the garden. Fact 5- Daniel moved to the office. Fact 6- John went to the hallway. Fact 7- John moved to the office. Fact 8- Daniel journeyed to the kitchen. Question: Where is John? Answer: office
Fact 7

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

Passage: Fact 1- Sandra went back to the office. Fact 2- Sandra moved to the bathroom. Question: Where is Sandra? Answer: bathroom

Fact 2