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.

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

Passage: Fact 1- Mary went to the kitchen. Fact 2- John went back to the bedroom. Question: Where is Mary? Answer: kitchen
Fact 1

Passage: Fact 1- Mary travelled to the bedroom. Fact 2- Daniel travelled to the office. Fact 3- Daniel journeyed to the hallway. Fact 4- Mary travelled to the hallway. Question: Where is Mary? Answer: hallway

Fact 4