Two construction workers sitting on some pipes while one waves, obscuring his face.
Two men sit down to each lunch
Sitting on some pipes does not imply to eat lunch.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(Theme(e2,x7) & Actor(e2,x5) & v_obscure(e2) & n_face(x7) & of(x7,x2) & n_male(x2) & n_worker(x5) & of(x5,x6) & n_construction(x6) & card_eq_2(x5) & while(e1,x4) & n_wave(x4) & card_eq_1(x4) & on(e1,x3) & n_pipe(x3) & Actor(e1,x1) & v_sit(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2) & card_eq_2(x1))
exists e1 x1.(all x2.(n_lunch(x2) -> to(e1,x2)) & r_down(e1) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_2(x1))