Baseball stadium is used for baseball. Pitcher mound is used for baseball. Play game is used for socialise. Airport is used for contest. Attend school is not used for contest. Baseball is used for play game. Attend school is not used for human contact. Pitcher mound is not used for mail letter. Attend school is used for socialise. Socialise causes you become more popular. Socialise is used for human contact. Pitcher mound is not used for rotate tire.
Play game is used for have fun.