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

Ex Output:
Fact 3


Ex Input:
Passage: Fact 1- Sandra journeyed to the bathroom. Fact 2- Mary travelled to the hallway. Question: Where is Mary? Answer: hallway

Ex Output:
Fact 2


Ex Input:
Passage: Fact 1- John went to the kitchen. Fact 2- John journeyed to the office. Question: Where is John? Answer: office

Ex Output:

Fact 2