A construction worker watches as a tractor dumps rocks onto a track.
A person helps with the creation of a new path around a lake.
A construction worker watching a tractor doesn't mean he is helping with they creation of a new path.
exists e1 p1 x1 x2.(exists e2 x3 x4 x5.(onto(e2,x5) & n_track(x5) & Theme(e2,x4) & Actor(e2,x3) & v_dump(e2) & n_rock(x4) & n_tractor(x3)) & as(e1,p1) & Actor(e1,x1) & v_watch(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 s1 x1 x2 x3 x4 x5.(n_creation(x3) & with(e1,x3) & around(x3,x5) & n_lake(x5) & of(x3,x4) & n_path(x4) & a_new(s1) & Theme(s1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_help(e1) & n_thing(x2) & n_person(x1))