Instructions: 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.
Input: "process paragraph : : Snow falls in an area for a very long time. The snow builds up for a very long time. The snow starts to become packed very firmly. The snow becomes something that's more like ice. Air pockets in the mass continue to grow smaller. The mass becomes solid and heavy enough to be called a glacier. The glacier moves because of gravity. ", "event : The snow builds up for a very long time.", "entity : glacier"
Output:
not exist