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- Sandra went to the garden. Fact 2- Mary travelled to the bathroom. Fact 3- Sandra moved to the bathroom. Fact 4- Mary travelled to the hallway. Fact 5- Mary went back to the kitchen. Fact 6- Daniel travelled to the bedroom. Question: Where is Mary? Answer: kitchen
Example Output: Fact 5

Example Input: Passage: Fact 1- Daniel travelled to the kitchen. Fact 2- Daniel went to the hallway. Fact 3- Mary travelled to the hallway. Fact 4- John went to the hallway. Fact 5- Sandra moved to the garden. Fact 6- Mary went to the kitchen. Question: Where is John? Answer: hallway
Example Output: Fact 4

Example Input: Passage: Fact 1- John went to the office. Fact 2- Mary journeyed to the garden. Fact 3- John went to the garden. Fact 4- John journeyed to the hallway. Question: Where is John? Answer: hallway
Example Output:
Fact 4