A rainbow is formed from a tank spraying water on a street.
An elephant is formed from a tank.
It is either a rainbow or an elephant.
exists e2 e1 x1 x2 x3 x4 x5.(from(e1,x2) & on(e2,x5) & n_street(x5) & Theme(e2,x4) & Actor(e2,x3) & v_spray(e2) & n_water(x4) & (x2 = x3) & n_tank(x2) & Theme(e1,x1) & v_form(e1) & n_rainbow(x1))
exists e1 x1 x2.(from(e1,x2) & n_tank(x2) & Theme(e1,x1) & v_form(e1) & n_elephant(x1))