Several people are walking down a trail.
The trail leads to a cliff.
A trail can lead many places, it does not have to lead to a cliff, that information cannot be assumed.
exists e1 s1 s2 x1 x2.(a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_trail(x2) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_trail(x1) & to(e1,x2) & n_cliff(x2) & Actor(e1,x1) & v_lead(e1))