A boy is sprayed by water.
A boy is sprayed by beer.
Beer is not water.
exists e1 x1 x2.(Actor(e1,x2) & n_water(x2) & Theme(e1,x1) & v_spray(e1) & n_boy(x1))
exists e1 x1 x2.(Actor(e1,x2) & n_beer(x2) & Theme(e1,x1) & v_spray(e1) & n_boy(x1))