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- John journeyed to the kitchen. Fact 3- Sandra went back to the garden. Fact 4- Mary travelled to the hallway. Question: Where is John? Answer: kitchen
Fact 2

Passage: Fact 1- Daniel travelled to the garden. Fact 2- Mary went back to the kitchen. Question: Where is Mary? Answer: kitchen
Fact 2

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

Fact 2