premise1: Man in white shirt tossing Frisbee for black and white dog who has a white Frisbee in its mouth.
premise2: A man is throwing frisbees into the air and the border collie is catching them in the air.
premise3: A black a white dog catching Frisbees thrown by a man in a white shirt
premise4: A dog jumps for a Frisbee at the Purina Incredible Dog Challenge.
premise: Man in white shirt tossing Frisbee for black and white dog who has a white Frisbee in its mouth. A man is throwing frisbees into the air and the border collie is catching them in the air. A black a white dog catching Frisbees thrown by a man in a white shirt A dog jumps for a Frisbee at the Purina Incredible Dog Challenge.
hypothesis: A dog catches flying discs.