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 moved to the bedroom. Fact 2- Mary went back to the bedroom. Question: Where is Mary? Answer: bedroom
Example Output: Fact 2

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