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 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- John went back to the garden. Fact 2- Sandra went back to the bedroom. Fact 3- Sandra went to the bathroom. Fact 4- John went back to the kitchen. Question: Where is John? Answer: kitchen
Example Output: Fact 4

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