A man is drawing on the ground.
A man is playing halo.
A man drawing on the ground cannot be playing halo same time.
exists e1 x1 x2.(n_ground(x2) & on(e1,x2) & Actor(e1,x1) & v_draw(e1) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_halo(x2) & n_man(x1))