A dog is catching a ball.
The dog is playing
Catching a ball is a type of play.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & n_ball(x2) & n_dog(x1))
exists e1 x1.(n_dog(x1) & Actor(e1,x1) & v_play(e1))