Two girls playing in a game of softball.
Some girls play softball.
Some girls play chess.
A group of teenagers are driving in a car.
People were getting off the bus.
Data is valid if it accurately represents what you believe is being measured.
A person walks a bike.
The media ignore Fitzsimmons real opinions on IDEs.
In the Figure 7, Projected Marginal Cost of SO2 Reductions ($/Ton)