A person is rock climbing underneath of a rock overhang.
A person is climbing rocks.
Someone who is rock climbing is climbing rocks.
exists p1 x1.(exists e1 x2 x3 x4 x5.((x1 = x2) & of(x2,x4) & n_overhang(x4) & of(x4,x5) & n_rock(x5) & n_underneath(x2) & Actor(e1,x2) & v_climb(e1) & of(x2,x3) & n_rock(x3)) & n_person(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_rock(x2) & n_person(x1))