sentence: There's a man wearing a white colored vest and blue hard hat rowing in a yellow row boat with double sided oar. sentence:  He is demonstrating the correct way to row the boat while staying afloat. sentence:  He is in a water body that has some strong waves. sentence:  He is showing how to do the strokes with the oars to go against the water current. sentence:  He goes in circles as he demonstrates how to row against powerful waves.