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 : : A fuel goes into the generator. The generator converts mechanical energy into electrical energy. A magnet moves near a wire. A steady flow of electrons is C. Electricity flows through a wire. Electricity comes out of the generator. ", "event : The generator converts mechanical energy into electrical energy.", "entity : fuel" 
A: 
 not exist 