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

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

Passage: Fact 1- Sandra went to the garden. Fact 2- Mary travelled to the bathroom. Question: Where is Sandra? Answer: garden

Fact 1