White-haired man works on sculpture.
The person working on the scultpure has been hired by the mayor of the town.
Just because a person is working on a sculpture does not mean that he has been hired by the mayor of the town.
exists e1 s1 x1 x2.(on(e1,x2) & n_sculpture(x2) & Actor(e1,x1) & v_work(e1) & n_man(x1) & a_white-haired(s1) & Theme(s1,x1))
exists e2 e1 x1 x2 x3 x4 x5.(n_town(x5) & n_mayor(x4) & n_scultpure(x3) & n_person(x1) & Actor(e2,x4) & of(x4,x5) & Theme(e2,x1) & v_hire(e2) & on(e1,x3) & Actor(e1,x2) & v_work(e1) & (x1 = x2))