A worker walking down the street.
A construction worker walking down the street.
A worker walking doesn't imply it is a construction worker.
exists e1 x1 x2 x3.(n_street(x3) & a_topic(x1) & down(e1,x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_worker(x1))
exists e1 x1 x2 x3 x4.(n_street(x4) & a_topic(x1) & down(e1,x4) & Actor(e1,x3) & v_walk(e1) & (x1 = x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))