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- Sandra went to the garden. Fact 2- John journeyed to the kitchen. Fact 3- John went back to the office. Fact 4- Daniel moved to the garden. Question: Where is John? Answer: office
Fact 3

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

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

Fact 8