construction workers are working on beams.
construction workers sitting and eating lunch
Workers cannot be working while also sitting and eating lunch.
exists e1 x1 x2 x3.(on(e1,x3) & n_beam(x3) & Actor(e1,x1) & v_work(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 e2 x1 x2 x3 x4 x5.(Theme(e2,x5) & Actor(e2,x3) & v_eat(e2) & n_lunch(x5) & n_worker(x3) & of(x3,x4) & n_construction(x4) & Actor(e1,x1) & v_sit(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))