Two people with yellow backpacks hiking up a hill.
Two people are climbing a hill on foot.
the two people are climbing up the hiking hill .
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & a_up(s2) & Manner(e1,s2) & Theme(e1,x4) & Actor(e1,x3) & v_hike(e1) & n_hill(x4) & (x2 = x3) & n_backpack(x2) & a_yellow(s1) & Theme(s1,x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(on(e1,x3) & n_foot(x3) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_hill(x2) & n_people(x1) & card_eq_2(x1))