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

Example Input: Passage: Fact 1- John journeyed to the hallway. Fact 2- Daniel journeyed to the hallway. Fact 3- Daniel went to the office. Fact 4- Sandra moved to the bedroom. Question: Where is Sandra? Answer: bedroom
Example Output: Fact 4

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