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 : : The frog eggs hatch. The tadpole breaks free. Slowly, the gills disappear over the next 6 weeks. The hind legs begin to form at 8 weeks. The front legs form at 12 weeks. The tail shrinks. The mouth grows larger. The tadpole can live on land as a frog. ", "event : The tadpole breaks free.", "entity : frog eggs" 

A:  not exist 
****
Q:  "process paragraph : : Baby rabbits are born alive. Rabbits are (only occasionally) nursed by their mothers. Many of the babies do not survive. Larger and stronger rabbit do manage to survive. Rabbits quickly become able to have babies of their own. The rabbit lifecycle continues. The amount of rabbits stays reasonable because of predators and low survival rates for their young. ", "event : Rabbits are (only occasionally) nursed by their mothers.", "entity : rabbits" 

A:
 unknown location 
****