There are two young people with backpacks on and then are standing next to a hiking trail.
Two young people without backpacks sit on the couch.
The two young people cannot have backpack and be without backpacks at the same time. The two young people cannot be standing and sitting at the same time. The two young people cannot be next to a hiking trail and on a couch at the same time.
exists e1 p1 p2 s1 x1 x2.(a_then(s1) & Manner(e1,s1) & exists s3 x7 x8.(to(s3,x7) & n_trail(x7) & of(x7,x8) & n_hiking(x8) & Theme(s3,x2) & a_next(s3)) & Topic(e1,p2) & Actor(e1,x2) & v_stand(e1) & exists s2 x3 x4 x5 x6.((x1 = x3) & on(x3,x5) & n_trail(x5) & of(x5,x6) & n_hiking(x6) & with(x3,x4) & n_backpack(x4) & n_people(x3) & a_young(s2) & Theme(s2,x3) & card_eq_2(x3)))
exists e1 s1 x1 x2.(n_couch(x2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & -exists x3.(with(x1,x3) & n_backpack(x3)) & n_people(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))