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 to the kitchen. Fact 2- John travelled to the hallway. Question: Where is John? Answer: hallway
Fact 2