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- John travelled to the bathroom. Fact 2- Sandra went to the kitchen. Fact 3- Daniel went to the garden. Fact 4- Mary moved to the bedroom. Fact 5- Sandra moved to the bathroom. Fact 6- John moved to the hallway. Question: Where is Sandra? Answer: bathroom
Fact 5

Passage: Fact 1- Mary moved to the bedroom. Fact 2- Sandra went back to the garden. Fact 3- Daniel went to the bedroom. Fact 4- Mary journeyed to the hallway. Question: Where is Mary? Answer: hallway
Fact 4

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

Fact 7