A construction worker walks down the street.
A construction worker walking.
If one walks, one is walking.
exists e1 x1 x2 x3.(n_street(x3) & down(e1,x3) & Actor(e1,x1) & v_walk(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists x1 x2 x3.(a_topic(x1) & n_walking(x1) & of(x1,x3) & n_worker(x3) & of(x1,x2) & n_construction(x2))