Two construction workers discuss work.
Three office workers talk about their children's play.
Construction works do not do the same work as office workers and work is not the same topic as children's play.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_discuss(e1) & n_work(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(about(e1,x4) & n_play(x4) & of(x4,x3) & n_child(x3) & of(x3,x1) & n_thing(x1) & Actor(e1,x1) & v_talk(e1) & n_worker(x1) & of(x1,x2) & n_office(x2) & card_eq_3(x1))