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- Mary travelled to the bedroom. Fact 2- Daniel travelled to the office. Question: Where is Mary? Answer: bedroom
Fact 1

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

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

Fact 7