The girl with the green tank top and gray shorts is standing in the middle of the empty railroad track.
a girl poses in running gear near a train track
The girl who stands in the middle of railroad track doesn't necessarily imply poses in running gear.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8.(n_track(x7) & of(x7,x8) & n_railroad(x8) & a_empty(s3) & Theme(s3,x7) & n_middle(x6) & n_shorts(x4) & a_gray(s2) & Theme(s2,x4) & n_top(x3) & of(x3,x5) & n_tank(x5) & subset_of(x4,x2) & subset_of(x3,x2) & a_green(s1) & Theme(s1,x2) & n_girl(x1) & in(e1,x6) & of(x6,x7) & Actor(e1,x1) & v_stand(e1) & with(x1,x2))
exists e1 e2 x1 x2 x3 x4.(in(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_run(e2) & near(x2,x3) & n_track(x3) & of(x3,x4) & n_train(x4) & n_gear(x2) & Actor(e1,x1) & v_pose(e1) & n_girl(x1))