The man is on a ski boat in the water.
The person is pulling a wagon down the street.
A boat is not the same as a wagon.
exists p1 x1 x4.(n_water(x4) & n_man(x1) & exists x2 x3.(on(x1,x2) & in(x2,x4) & n_boat(x2) & of(x2,x3) & n_ski(x3)))
exists e1 x1 x2 x3.(n_street(x3) & n_person(x1) & down(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_pull(e1) & n_wagon(x2))