Man drawing art on the ground.
man is drawing a picture of a whale
The man could be drawing anything, not necessarily a whale.
exists x1 x2 x3 x4.(n_ground(x4) & a_topic(x1) & on(x1,x4) & n_art(x1) & of(x1,x3) & n_drawing(x3) & of(x1,x2) & n_man(x2))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_draw(e1) & of(x2,x3) & n_whale(x3) & n_picture(x2) & n_man(x1))