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 : : The saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow. Your tongue helps out, pushing the food around while you chew with your teeth. The esophagus moves food from the back of your throat to your stomach. Strong muscles in the walls of the stomach and gastric juices break down food in your stomach. Your stomach moves the food into the intestines to complete digestion. ", "event : Your tongue helps out, pushing the food around while you chew with your teeth.", "entity : chemicals"
A:
known location