Hikers walking along a rocky trail.
Backpackers climbing an unstable terrain.
the unstable and rocky destination in which hikers and backpackers frequent .
exists e1 s1 x1 x2 x3.(a_topic(x1) & along(e1,x3) & n_trail(x3) & a_rocky(s1) & Theme(s1,x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_hiker(x1))
exists e1 s1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_climb(e1) & n_terrain(x3) & a_unstable(s1) & Theme(s1,x3) & (x1 = x2) & n_backpacker(x1))