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. 

Example Input:  "process paragraph : : Place the water in a pot. Cover the pot with a slightly too large cover. Place a larger pot under the first. Heat water to evaporation. Water vapor will collect on the lid. Drip into the second pot as fresh water. Salt is left behind in the original pot. ", "event : Cover the pot with a slightly too large cover.", "entity : water" 
Example Output:  known location 

Example Input:  "process paragraph : : Coal is burned at a furnace. The resulting heat energy is used to heat water. The heated water is turned into steam. The steam drives a generator. Electricity is produced. ", "event : The resulting heat energy is used to heat water.", "entity : coal" 
Example Output:  not exist 

Example Input:  "process paragraph : : He air we breathe contains oxygen and other gases. Once in the lungs, oxygen is moved into the bloodstream and carried through your body. At each cell in your body, oxygen is exchanged for a waste gas called carbon dioxide. Your bloodstream then carries this waste gas back to the lungs where it is removed from the blood stream and then exhaled. Your lungs and respiratory system automatically perform this vital process, called gas exchange. ", "event : Once in the lungs, oxygen is moved into the bloodstream and carried through your body.", "entity : air" 
Example Output:
 unknown location