A dark brown dog is chewing on a stick.
An animal has something in his mouth.
A white dog is chewing on a steak.
men are participating in road ride.
The man has something covering his face.
Since they have to have income taxes collected, bookkeeping is sometimes harder.
The website is struggling to produce netcast.
There are people gathering.
Applying that definition means you should learn virtually everything about what's being studied.