Given the task definition and input, reply with output. 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. 

 "process paragraph : : The salt water is heated. As the saltwater is heated the water becomes a gas. The salt particles sink to the bottom of the container. Gaseous water is piped into another container. Allowed to cool. The salt particles are left behind in the first container. The second container contains fresh water. ", "event : As the saltwater is heated the water becomes a gas.", "entity : salt water" 

 not exist 