Four elementary-aged children , two boys and two girls , play on a green lawn with a tree and a building in the background .
Four children play outdoors .
Four elementary-aged children, two boys and two girls, play on a green lawn with a tree and a building in the background.
Four children play outdoors.
If four children are playing on a green lawn, they are playing outdoors.
If four children are playing on a green lawn , they are playing outdoors .