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

Ex Output:
Fact 2


Ex Input:
Passage: Fact 1- Mary went back to the kitchen. Fact 2- Sandra travelled to the kitchen. Fact 3- John moved to the bathroom. Fact 4- Sandra travelled to the bedroom. Question: Where is Sandra? Answer: bedroom

Ex Output:
Fact 4


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

Ex Output:

Fact 4