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 : : Dissolution of limestone forms caves. Rain gets carbon dioxide from the air. When rain goes into soil it creates an acid. The acid dissolves the limestone along cracks. Some will dissolve enough to form caves. ", "event : Rain gets carbon dioxide from the air.", "entity : carbon dioxide" 

A:  not exist 
****
Q:  "process paragraph : : You pack up your car with food, tents, sleeping bags, etc. Drive to your camping spot. Put up your tent. Hide your food from bears. Make a campfire. Roast marshmellows. Go to sleep in the tent. Wake up and enjoy nature. ", "event : Drive to your camping spot.", "entity : food" 

A:  known location 
****
Q:  "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" 

A:
 known location 
****