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