The baker is working on machine.
bakery worker repairs bread making machine
Working doesn't imply repairs.Machine doesn't imply bread making machine.
exists e1 x1 x2.(n_baker(x1) & on(e1,x2) & n_machine(x2) & Actor(e1,x1) & v_work(e1))
exists e1 x1 x2 x3 x4 x5.(n_machine(x1) & Actor(e1,x1) & v_make(e1) & of(x1,x5) & n_bread(x5) & of(x1,x4) & n_repair(x4) & of(x1,x3) & n_worker(x3) & of(x1,x2) & n_bakery(x2) & a_topic(x1))