The baker is working on machine.
man fixing a machine
A baker can be a man and in order to fix a machine it must be worked on.
exists e1 x1 x2.(n_baker(x1) & on(e1,x2) & n_machine(x2) & Actor(e1,x1) & v_work(e1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_fix(e1) & n_machine(x3) & (x1 = x2) & n_man(x1))