Big multicolored balloons.
The multicolored ballons fill the sky.
balloons doesn't always mean .fill the sky.
exists e1 x1 x2.(ne_nam_big(x1) & Theme(e1,x2) & Actor(e1,x1) & v_multicolor(e1) & n_balloon(x2))
exists e1 s1 x1 x2.(n_sky(x2) & n_ballon(x1) & a_multicolored(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_fill(e1))