 "process paragraph : : An area is at a higher elevation than the surrounding area. Rain falls. Water is in the area of high elevation. The water creates a stream. The stream moves towards lower elevation. The stream continues along the same path for a long time. The soil and rocks erode where the stream touches them. The stream moves deeper into the soil. The stream is smaller than the eroded area. ", "event : Rain falls.", "entity : rain" 
 not exist 