A black Labrador retriever in a grassy field returns with a white nubby cylinder in its mouth .
It is unlikely that labrador Retrievers are energetic dogs that will play catch for hours .
It is probably the case that labrador Retrievers are energetic dogs that will play catch for hours .
It is unlikely that labrador Retrievers are energetic dogs that will play catch for hours .
Labrador Retrievers are energetic dogs that will play catch for hours .