Detailed Instructions: 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. 
Q:  "process paragraph : : A plant or animal dies in mud or soil. The bones are all that remains. Over time the bones are covered in sediment. The sediment becomes rock. The rock becomes a fossil. ", "event : The bones are all that remains.", "entity : plant or animal" 
A:
 not exist 