Construction workers are digging a ditch.
Two women on bikes.
It's hard to be digging a ditch on bikes.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_dig(e1) & n_ditch(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_bike(x2) & n_woman(x1) & card_eq_2(x1))