A person is performing a diving stunt off a tall building.
A person is jumping off a cliff.
A tall building and a cliff are two different objects.
exists e1 s1 x1 x2 x3 x4.(off(e1,x4) & n_building(x4) & a_tall(s1) & Theme(s1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_stunt(x2) & of(x2,x3) & n_diving(x3) & n_person(x1))
exists e1 s1 x1 x2.(a_off(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_cliff(x2) & n_person(x1))