sentence: two men travel in a car pulling a boat. sentence:  Then, a man does water ski in a lake pulling by a boat. sentence:  The man falls from the skis to the water, then he continues water skiing. sentence:  A man is in the water and stands on a circle surfboard but falls while other people are water skiing. sentence:  After, people sits on the grass doing a pic nick. sentence:  A couple sit on a inflatable ring and water ski. sentence:  Next, a man slides on a circle surfboard while others water ski on surfboards.