Kids sit on a ledge and talk.
Kids sitting on a big ledge are talking.
All ledges are not big.
exists e1 x1 x2 x3 x4.(on(e1,x2) & n_talk(x4) & n_ledge(x3) & subset_of(x4,x2) & subset_of(x3,x2) & Actor(e1,x1) & v_sit(e1) & n_kid(x1))
exists e1 e2 s1 x1 x2 x3.(Actor(e2,x1) & v_talk(e2) & on(e1,x3) & n_ledge(x3) & a_big(s1) & Theme(s1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_kid(x1))