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

Example Input: Passage: Fact 1- Sandra journeyed to the bathroom. Fact 2- Mary travelled to the hallway. Question: Where is Mary? Answer: hallway
Example Output: Fact 2

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