Q: 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- Daniel travelled to the bathroom. Fact 2- Sandra moved to the hallway. Fact 3- Sandra went to the office. Fact 4- Mary journeyed to the kitchen. Question: Where is Mary? Answer: kitchen
A:
Fact 4