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- 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- Mary went back to the kitchen. Fact 2- John went back to the office. Question: Where is John? Answer: office
Example Output: Fact 2

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