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

[EX Q]: Passage: Fact 1- Sandra went back to the bedroom. Fact 2- Mary went back to the hallway. Fact 3- Mary moved to the bathroom. Fact 4- Mary went to the hallway. Question: Where is Mary? Answer: hallway
[EX A]: Fact 4

[EX Q]: Passage: Fact 1- John went to the hallway. Fact 2- Daniel moved to the garden. Fact 3- John went back to the bedroom. Fact 4- Mary journeyed to the garden. Question: Where is John? Answer: bedroom
[EX A]:
Fact 3