A little girl walking down a dirt road behind a group of other walkers.
A girl is riding a bicycle down a grassy hill.
If one is walking on a dirt road, they are not riding a bicycle down a grassy hill.
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 s1 x1 x2 x3.(down(e1,x3) & n_hill(x3) & a_grassy(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & n_girl(x1))