Instruct: Classify Amazon reviews into positive or negative sentiment
Query: For retirees, not for serious professional track

When I ordered swimming instructions, I expected a pro to show the best muscle movement. My kids may or may not participate Olympics when they grow up, but they'll learn the professional movements in any sport they try. The cover uses a pro as an enticement. The guy in the video is actually no Michael Phelps, but a round belly polar bear, whose postures are in every ways against fluid dynamics. Please, mark your DVD in the appropiate category: the title should say "fun ways to swim for retirees".