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.
Q: Passage: Fact 1- Daniel journeyed to the bedroom. Fact 2- John went to the kitchen. Fact 3- Mary moved to the office. Fact 4- Sandra travelled to the bathroom. Question: Where is Sandra? Answer: bathroom
A: 
Fact 4