A blond girl is stepping on vertical logs in the sand.
A blond girl is on a beach with logs.
Being in the sand does not imply being on the beach.
exists e1 s1 s2 x1 x2 x3.(n_sand(x3) & in(e1,x3) & on(e1,x2) & n_log(x2) & a_vertical(s2) & Theme(s2,x2) & Actor(e1,x1) & v_step(e1) & n_girl(x1) & a_blond(s1) & Theme(s1,x1))
exists p1 s1 x1.(exists x2 x3.(on(x1,x2) & with(x2,x3) & n_log(x3) & n_beach(x2)) & n_girl(x1) & a_blond(s1) & Theme(s1,x1))