A dog turns on the grass to persue a flying ball.
The dog is playing catch with his owner
Every playing dog is not accompanied by its owner.
exists e1 p1 x1 x2.(n_grass(x2) & on(e1,x2) & Topic(x2,p1) & exists e2 e3 x3.(Theme(e3,x3) & Actor(e3,x2) & v_persue(e3) & n_ball(x3) & Actor(e2,x3) & v_fly(e2)) & Actor(e1,x1) & v_turn(e1) & n_dog(x1))
exists e1 x1 x2 x3.(n_owner(x3) & of(x3,x1) & n_male(x1) & n_dog(x1) & with(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_catch(x2))