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

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

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