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.

[Q]: 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. Question: Where is Mary? Answer: bathroom
[A]: Fact 4


[Q]: Passage: Fact 1- Mary journeyed to the hallway. Fact 2- Sandra went to the garden. Fact 3- Sandra journeyed to the hallway. Fact 4- Mary journeyed to the bathroom. Fact 5- John went to the bathroom. Fact 6- Mary went back to the kitchen. Question: Where is Mary? Answer: kitchen
[A]: Fact 6


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