A little boy and a little girl are walking up a hill with trees on both sides.
Two children are outside walking.
A boy and a girl are two children.
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 p1 x1.(exists s1 x2.((x1 = x2) & n_walking(x2) & a_outside(s1) & Theme(s1,x2)) & n_child(x1) & card_eq_2(x1))