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 bathroom. Fact 2- Daniel went to the bedroom. Question: Where is Sandra? Answer: bathroom
Example Output: Fact 1

Example Input: Passage: Fact 1- Mary journeyed to the office. Fact 2- Daniel journeyed to the bedroom. Question: Where is Daniel? Answer: bedroom
Example Output: Fact 2

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. Fact 7- John moved to the garden. Fact 8- John went back to the bathroom. Fact 9- Mary went to the hallway. Fact 10- Daniel moved to the kitchen. Question: Where is Mary? Answer: hallway
Example Output:
Fact 9