Two men sitting on the roof of a house while another one stands on a ladder.
Two men are on a roof.
Sitting on the roof is something that can be done on a roof.
exists e1 x1 x2 x3 x4 x5 x6 x7.(n_stand(x5) & card_eq_1(x5) & n_roof(x3) & a_topic(x1) & on(e1,x7) & n_ladder(x7) & while(e1,x6) & n_stand(x6) & card_eq_1(x6) & -(x6 = x5) & on(e1,x3) & of(x3,x4) & n_house(x4) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_roof(x2)) & n_man(x1) & card_eq_2(x1))