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 : : Hydrogen atoms in a star combine together to form helium atoms. All of the hydrogen in a star turns into helium. The star begins to collapse. Helium atoms combine together to form carbon atoms. The star gets much bigger than it was before. The star is now a red giant. ", "event : All of the hydrogen in a star turns into helium.", "entity : hydrogen atoms" 
 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 : : Adult rabbits mate. The female becomes pregnant. The female gives birth to rabbit babies. The rabbit babies grow into adult rabbits. The new adults mate with other rabbits. Produce more rabbits. ", "event : The female becomes pregnant.", "entity : adult rabits" 

 unknown location