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

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

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