TASK DEFINITION: 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. 
PROBLEM:  "process paragraph : : Oil is gathered through mining operations. The oil is transported to stores. Oil is purchased by homeowners. Oil is placed into a stove in the house. The oil is lit on fire, and burns for a long time. The warm air off of the oil travels through the house. ", "event : The oil is transported to stores.", "entity : oil" 

SOLUTION:  known location 

PROBLEM:  "process paragraph : : Water vapor gets into the atmosphere through a process called evaporation. This then turns the water that is at the top of oceans, rivers and lakes into water vapor in the atmosphere using energy from the sun. The water vapor rises in the atmosphere and there it cools down. Water vapor rises in the atmosphere and there it cools down and forms tiny water droplets through something called condensation. These then turn into clouds. When they all combine together, they grow bigger and are too heavy to stay up there in the air. This is when they will fall to the ground as rain, or maybe snow or hail by gravity. ", "event : This then turns the water that is at the top of oceans, rivers and lakes into water vapor in the atmosphere using energy from the sun.", "entity : water" 

SOLUTION:  not exist 

PROBLEM:  "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" 

SOLUTION:
 not exist