Two people with yellow backpacks hiking up a hill.
Two people in yellow backpacks sit at the base of a hill.
Hiking up a hill and sitting at the base of the hill are different things. Also, being with backpacks and being in backpacks are different.
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 s1 x1 x2 x3 x4.(n_base(x3) & at(e1,x3) & of(x3,x4) & n_hill(x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_backpack(x2) & a_yellow(s1) & Theme(s1,x2) & n_people(x1) & card_eq_2(x1))