A man wearing a blue uniform working on mechanics.
A man is working on a machine.
Working on a machine is the same as working on mechanics
exists e2 e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & on(e1,x5) & n_mechanic(x5) & Actor(e1,x4) & v_work(e1) & (x3 = x4) & n_uniform(x3) & a_blue(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(on(e1,x2) & n_machine(x2) & Actor(e1,x1) & v_work(e1) & n_man(x1))