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

Passage: Fact 1- Mary travelled to the kitchen. Fact 2- Sandra moved to the office. Fact 3- Mary went back to the bedroom. Fact 4- Mary journeyed to the kitchen. Question: Where is Mary? Answer: kitchen
Fact 4

Passage: Fact 1- Sandra moved to the bedroom. Fact 2- Mary journeyed to the bedroom. Question: Where is Mary? Answer: bedroom

Fact 2