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- Daniel moved to the garden. Fact 2- Mary went back to the bathroom. Fact 3- Daniel travelled to the kitchen. Fact 4- Sandra went to the kitchen. Question: Where is Sandra? Answer: kitchen
Example Output: Fact 4

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

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