The hikers descend on the mountain.
Some people are going down a path.
There are many ways to come down a mountain besides going down a path.
exists e1 x1 x2.(n_mountain(x2) & n_hiker(x1) & on(e1,x2) & Actor(e1,x1) & v_descend(e1))
exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_path(x2) & n_people(x1))