A football player is catching the football.
A boy plays catch with a football.
Not every football player is a boy.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & n_football(x2) & n_football(x2) & n_player(x1) & of(x1,x2))
exists e1 x1 x2 x3.(with(e1,x3) & n_football(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_catch(x2) & n_boy(x1))