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. 

[EX Q]:  "process paragraph : : Energy is created by burning either diesel or petrol in a combustion chamber. The energy is transferred from the pistons moving up and down at high speeds. This piston motion is converted to a rotary motion through the crankshaft and axle. The axle turns the wheels. The car moves forward. ", "event : The energy is transferred from the pistons moving up and down at high speeds.", "entity : diesel" 
[EX A]:  not exist 

[EX Q]:  "process paragraph : : A bird picks a spot high spot, often in a tree. The bird collects bits of sticks and grass. The sticks and grasses are placed between support branches. Leaves, mud and spider webs are added to the sticks. The mud, leaves and webs glue the sticks together. The solid nest supports the eggs. ", "event : The bird collects bits of sticks and grass.", "entity : sticks and grass" 
[EX A]:  unknown location 

[EX Q]:  "process paragraph : : There is a lot of rain. Water levels of a river or lake get higher. Water builds up on the ground. Water covers streets. Water goes into houses. The rain or other source of water stops. Water flows into streams. The rest of the water evaporates. ", "event : Water levels of a river or lake get higher.", "entity : rain" 
[EX A]:
 unknown location