A brown dog leaps over the water in a grassy and tree-lined yard .
A dog is laying on the couch .
A brown dog leaps over the water in a grassy and tree-lined yard.
A dog is laying on the couch.
A dog does not have to be brown.  If a dog leaps over the water it is not laying on the couch.
A dog does not have to be brown . If a dog leaps over the water it is not laying on the couch .