A person is climbing to the top of a rock cliff.
A person is climbing.
in both sentences, a person is climbing.
exists e1 x1 x2 x3 x4.(n_top(x2) & to(e1,x2) & of(x2,x3) & n_cliff(x3) & of(x3,x4) & n_rock(x4) & Actor(e1,x1) & v_climb(e1) & n_person(x1))
exists e1 x1.(Actor(e1,x1) & v_climb(e1) & n_person(x1))