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.

[EX Q]: 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. Question: Where is Sandra? Answer: garden
[EX A]: Fact 2

[EX Q]: Passage: Fact 1- Sandra journeyed to the garden. Fact 2- Daniel travelled to the bathroom. Fact 3- Sandra went to the bedroom. Fact 4- Sandra travelled to the hallway. Question: Where is Sandra? Answer: hallway
[EX A]: Fact 4

[EX Q]: Passage: Fact 1- John went to the bathroom. Fact 2- John went back to the hallway. Fact 3- Sandra went back to the kitchen. Fact 4- Daniel went back to the office. Question: Where is John? Answer: hallway
[EX A]:
Fact 2