Water spraying from a green truck is making a rainbow.
The truck is a dump truck.
Not every truck is a dump truck.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_make(e1) & n_rainbow(x4) & from(x1,x3) & n_truck(x3) & a_green(s1) & Theme(s1,x3) & n_spray(x1) & (x1 = x2) & ne_nam_water(x2))
exists p1 x1.(n_truck(x1) & exists x2 x3.((x1 = x2) & n_truck(x2) & of(x2,x3) & n_dump(x3)))