A little girl walking down a dirt road behind a group of other walkers.
A tired girl is having trouble keeping up with her parents.
A girl walking behind other walkers does not imply either that she is having trouble or that the walkers are her parents.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7.(n_walker(x7) & a_topic(x1) & behind(e1,x5) & of(x5,x6) & -(x6 = x7) & n_walker(x6) & n_group(x5) & a_down(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x2) & v_walk(e1) & n_road(x3) & of(x3,x4) & n_dirt(x4) & (x1 = x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1))
exists e1 p1 s1 x1 x2 x3.(exists e2 s2.(a_up(s2) & Manner(e2,s2) & with(e2,x3) & Actor(e2,x2) & v_keep(e2)) & n_parent(x3) & of(x3,x1) & n_female(x1) & Recipient(e1,p1) & Actor(e1,x1) & Topic(e1,x2) & v_have(e1) & n_trouble(x2) & n_girl(x1) & a_tired(s1) & Theme(s1,x1))