A little boy and a little girl are walking up a hill with trees on both sides.
A female and male child are walking up a hill so they can role down it when they reach the top.
A boy and girl may walk up a hill without the purpose of rolling back down it when reaching the top.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6.(n_side(x6) & on(e1,x6) & with(e1,x5) & n_tree(x5) & a_up(s3) & Manner(e1,s3) & Theme(e1,x4) & Actor(e1,x1) & v_walk(e1) & n_hill(x4) & subset_of(x3,x1) & n_girl(x3) & a_little(s2) & Theme(s2,x3) & subset_of(x2,x1) & n_boy(x2) & a_little(s1) & Theme(s1,x2))
exists e1 p1 p2 s1 s2 s3 x1 x2 x4.(n_top(x4) & exists e3.(Theme(e3,x4) & Actor(e3,x1) & v_reach(e3)) & n_thing(x1) & n_thing(x1) & n_thing(x1) & when(e1,p2) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x1) & v_can(e2) & down(x3,x1) & n_role(x3)) & so(e1,p1) & a_up(s3) & Manner(e1,s3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_hill(x2) & n_child(x1) & a_male(s2) & Theme(s2,x1) & a_female(s1) & Theme(s1,x1))