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 star forms. The star does not have enough mass to become a neutron star. The star goes through a change in its core and bonds helium to carbon and oxygen. The star becomes a red giant. A mass of carbon and oxygen builds up in the center of the star. The star sheds its outside layers and becomes a nebula. The star leaves behind the core which becomes a dwarf star. ", "event : The star does not have enough mass to become a neutron star.", "entity : star" 
A: 
 unknown location 