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- Mary went back to the office. Fact 2- Mary went to the bathroom. Fact 3- Mary went back to the hallway. Fact 4- John journeyed to the hallway. Fact 5- John travelled to the garden. Fact 6- Sandra went back to the office. Question: Where is Mary? Answer: hallway
Fact 3

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

Passage: Fact 1- Daniel went to the kitchen. Fact 2- Mary travelled to the hallway. Fact 3- Daniel went back to the garden. Fact 4- Mary went back to the bathroom. Fact 5- Sandra moved to the hallway. Fact 6- John moved to the garden. Question: Where is Daniel? Answer: garden

Fact 3