A group of backpackers treks across a green hill with snowcapped mountains off in the distance.
A group of backpackers is lost in the mountains.
Just because you go trekking with mountains in the view,  it doesn't mean you are lost in them.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_distance(x6) & a_topic(x1) & with(x1,x5) & in(x5,x6) & r_off(x5) & n_mountain(x5) & Theme(e1,x5) & v_snowcapp(e1) & of(x1,x2) & across(x2,x4) & n_hill(x4) & a_green(s1) & Theme(s1,x4) & n_trek(x2) & of(x2,x3) & n_backpacker(x3) & n_group(x1))
exists e1 x1 x2 x3.(n_mountain(x3) & in(e1,x3) & Theme(e1,x1) & v_lose(e1) & of(x1,x2) & n_backpacker(x2) & n_group(x1))