A black and white dog is running down some white steps .
A black and white dog is running down white steps to fetch a ball .
A black and white dog is running down some white steps.
A black and white dog is running down white steps to fetch a ball.
It is unclear whether or not the dog is going to fetch a ball or to bite the mailman or to bite the mailman's balls (which the mailman may or may not throw).
It is unclear whether or not the dog is going to fetch a ball or to bite the mailman or to bite the mailman 's balls ( which the mailman may or may not throw ) .