A young boy is playing tee-ball
The boy is playing a sport.
The boy is playing tennis.
There are no people in front of a movie theater.
People are sitting inside drinking coffee.
A man is stealing a car.
A lot of people can't afford that, not to mention those kids who are forced to work all the time.
A band performs indoors.
The quality of water used for culturing and dilution doesn't really matter.