A mountain climber scales a steep rock face.
There is a person climbing rock.
A person climbing rock is more than likely a mountain climber and the rock is further defined as a steep rock face.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_scale(e1) & n_face(x3) & of(x3,x4) & n_rock(x4) & a_steep(s1) & Theme(s1,x3) & n_climber(x1) & of(x1,x2) & n_mountain(x2))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_climb(e1) & n_rock(x4) & (x2 = x3) & n_person(x2))