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.

Example Input: Passage: Fact 1- John went to the kitchen. Fact 2- John journeyed to the office. Fact 3- Daniel travelled to the bedroom. Fact 4- John journeyed to the kitchen. Question: Where is John? Answer: kitchen
Example Output: Fact 4

Example Input: Passage: Fact 1- Mary went to the hallway. Fact 2- Daniel went to the bathroom. Fact 3- Mary went to the bedroom. Fact 4- Mary went to the kitchen. Question: Where is Mary? Answer: kitchen
Example Output: Fact 4

Example Input: Passage: Fact 1- Daniel moved to the garden. Fact 2- Sandra moved to the hallway. Fact 3- John went to the hallway. Fact 4- John went to the office. Fact 5- John went to the kitchen. Fact 6- John went back to the hallway. Fact 7- Sandra journeyed to the office. Fact 8- Mary journeyed to the bedroom. Fact 9- Sandra travelled to the hallway. Fact 10- Mary went back to the bathroom. Question: Where is Mary? Answer: bathroom
Example Output:
Fact 10