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.
--------
Question: Passage: Fact 1- Mary journeyed to the office. Fact 2- Sandra travelled to the bathroom. Fact 3- Sandra travelled to the office. Fact 4- Mary went back to the hallway. Question: Where is Mary? Answer: hallway

Answer: Fact 4


Question: Passage: Fact 1- John moved to the bedroom. Fact 2- Mary went back to the bedroom. Question: Where is Mary? Answer: bedroom

Answer: Fact 2


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

Answer:
Fact 9