A person hanging off of a cliff on a rope.
There's a person trying to climb a cliff.
Just because a person is hanging off a cliff on a rope doesn't mean trying to climb a cliff.
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(e1,x3) & on(x3,x4) & n_rope(x4) & n_cliff(x3) & r_off(e1) & Actor(e1,x2) & v_hang(e1) & (x1 = x2) & n_person(x1))
exists p1 x1 e1 p2 x2 x3.((x1 = x2) & Topic(e1,p2) & Actor(e1,x3) & v_try(e1) & exists e2 x4.(Theme(e2,x4) & Actor(e2,x3) & v_climb(e2) & n_cliff(x4)) & (x2 = x3) & n_person(x2))