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 moved to the office. Fact 2- Daniel went to the kitchen. Question: Where is Mary? Answer: office

Ex Output:
Fact 1


Ex Input:
Passage: Fact 1- Sandra went back to the bedroom. Fact 2- Mary went back to the hallway. Question: Where is Mary? Answer: hallway

Ex Output:
Fact 2


Ex Input:
Passage: Fact 1- John went back to the garden. Fact 2- Sandra went back to the bedroom. Question: Where is John? Answer: garden

Ex Output:

Fact 1