A man throws a disc in a park.
The man is playing catch with his dog.
A man can throw a disc for other reasons besides playing catch with his dogs.
exists e1 x1 x2 x3.(in(e1,x3) & n_park(x3) & Theme(e1,x2) & Actor(e1,x1) & v_throw(e1) & n_disc(x2) & n_man(x1))
exists e1 x1 x2 x3.(n_dog(x3) & of(x3,x1) & n_male(x1) & n_man(x1) & with(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_catch(x2))