sentence: A boy watches as a semi truck drives through the desert. sentence:  A man puts on his helmet and pushes off into the river on a kayak. sentence:  A man paddles on rapids and down a river on a kayak. sentence:  A man fishes from a beach on the shore of a river. sentence:  A group prepares a picnic on the shore. sentence:  A man flips over on his kayak from being turned over in the water.