A construction worker working by painting a subway.
A worker is painting.
The construction worker painting a subway is the worker.
exists e1 e2 x1 x2 x3 x4.(a_topic(x1) & by(e1,e2) & Theme(e2,x4) & Actor(e2,x3) & v_paint(e2) & n_subway(x4) & Actor(e1,x3) & v_work(e1) & (x1 = x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists p1 x1.(exists x2.((x1 = x2) & n_painting(x2)) & n_worker(x1))