A laughing baby is surrounded by balls of various colors.
An old man is surrounded by balls.
One cannot be both a baby and an old man.
exists e1 e2 s1 x1 x2 x3.(Actor(e2,x2) & of(x2,x3) & n_color(x3) & a_various(s1) & Theme(s1,x3) & n_ball(x2) & Theme(e2,x1) & v_surround(e2) & n_baby(x1) & Actor(e1,x1) & v_laugh(e1))
exists e1 s1 x1 x2.(Actor(e1,x2) & n_ball(x2) & Theme(e1,x1) & v_surround(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))