A man is shining shoes.
A man shines shoes on a street corner.
A man shining shoes is not necessarily on a street corner.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_shine(e1) & n_shoe(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(on(e1,x3) & n_corner(x3) & of(x3,x4) & n_street(x4) & Theme(e1,x2) & Actor(e1,x1) & v_shine(e1) & n_shoe(x2) & n_man(x1))