sentence: A black and white dog is standing near the main door of a house as he listens to the sound of helicopter. sentence:  Then main door then opens and the dog steps back. sentence:  There are two dog trainers in an enclosed room training a dog to jump and catch several Frisbee. sentence:  the male trainer throws the Frisbee at the dog and the dog jumps and fetches it for him. sentence:  The trainer continuously throws the Frisbee and dog jumps high up and grabs the Frisbee every time. sentence:  There are several different trainers shown training and teaching their dogs tricks.