You will be given a definition of a task first, then some input of the task.
In this task, you are given a paragraph, event and an entity. The event is part of the given paragraph and it changes the state of the entity. Your task is to classify the state of the entity into three classes: 1) not exist, 2) unknown location and 3) known location. "not exist" means the entity doesn't exist in that state anymore. "unknown location" means the entity exists in that state but location is unknown. "known location" means the entity exists and location is known.

"process paragraph : : Living things have carbon in them. Living things die. The remains of living things eventually become buried underground. More physical pressure is put on the remains of living things as they become further underground. This carbon-based mixture stays underground for a long time. Humans discover this carbon-based mixture. This carbon-based mixture is brought up to the earth's surface. The recently discovered fossil fuel is burned. Burning releases the energy that has been stored in the fossil fuel. The energy can be used to generate power. ", "event : Living things die.", "entity : living things ; remains of living things"
Output:
unknown location