A person climbing down a sheer rock cliff using a rope
A person is rock climbing.
The person may not be rock climbing, but mountain climbing as well.
exists e2 e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & for(e1,e2) & Theme(e2,x5) & Actor(e2,x2) & v_use(e2) & n_rope(x5) & a_down(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x2) & v_climb(e1) & n_cliff(x3) & of(x3,x4) & n_rock(x4) & a_sheer(s1) & Theme(s1,x3) & (x1 = x2) & n_person(x1))
exists p1 x1.(exists x2 x3.((x1 = x2) & n_climb(x2) & of(x2,x3) & n_rock(x3)) & n_person(x1))