A group of girls posing for a picture in the street.
girls post for facebook picture
You can't imply that the group of girls are posing for facebook.
exists e1 x1 x2 x3 x4 x5.(n_street(x5) & a_topic(x1) & for(e1,x4) & in(x4,x5) & n_picture(x4) & Actor(e1,x3) & v_pose(e1) & (x1 = x3) & of(x1,x2) & n_girl(x2) & n_group(x1))
exists x1 x2 x3 x4.(a_topic(x1) & for(x1,x3) & n_picture(x3) & of(x3,x4) & n_facebook(x4) & n_post(x1) & of(x1,x2) & n_girl(x2))