A worker making sure his machine is working correctly.
A construction worker inspects his bulldozer.
Construction workers are not the only kinds of workers. There are machines other than bulldozers.
exists e1 p1 x1 x2 x3.(a_topic(x1) & exists e2 p2.(exists e3 s1.(a_correctly(s1) & Manner(e3,s1) & Actor(e3,x3) & v_work(e3)) & Topic(e2,p2) & Actor(e2,x2) & v_sure(e2)) & n_machine(x3) & of(x3,x1) & n_male(x1) & Topic(e1,p1) & Actor(e1,x2) & v_make(e1) & (x1 = x2) & n_worker(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_inspect(e1) & n_bulldozer(x3) & of(x3,x1) & n_male(x1) & n_worker(x1) & of(x1,x2) & n_construction(x2))