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 : : Plants and animals long ago died. They are buried under layers of soil. Pressure builds over time. The remains liquefy. The carbon atoms rearrange to become a new substance. ", "event : They are buried under layers of soil.", "entity : plants" 
 not exist 

 "process paragraph : : People dig up coal from the ground. People burn coal for heat or electricity. Pollution from the coal goes into the sky. Coal pollution enters clouds. Clouds rain over an area. The polluted rain becomes acid rain. ", "event : People burn coal for heat or electricity.", "entity : coal" 
 not exist 

 "process paragraph : : You wash the wound. You apply a bandaid or other covering if needed. The blood clots. A scab forms. The skin repairs itself under the protective cover of the scab. The scab falls off. ", "event : You apply a bandaid or other covering if needed.", "entity : Wound" 

 known location