Construction workers walking along train tracks.
The workers are building a bridge.
We know they are workers but we don't know they are building a bridge.
exists e1 x1 x2 x3 x4.(along(e1,x3) & n_track(x3) & of(x3,x4) & n_train(x4) & Actor(e1,x1) & v_walk(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 x1 x2.(n_worker(x1) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_bridge(x2))