Detailed 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. 
Q:  "process paragraph : : There are places inside Earth where rock will melt. Melted rock inside the Earth is also called molten rock, or magma. Magma moves up through Earth's crust, but it does not always reach the surface. When magma erupts onto Earth's surface, it is known as lava. As lava flows from volcanoes it starts to cool. Minerals form when magma and lava cool. ", "event : Melted rock inside the Earth is also called molten rock, or magma.", "entity : rock ; melted rock ; magma" 
A:
 known location 