There are four males standing and washing dishes in a kitchen with their back to the room.
Roommates are washing dishes before their guests arrive.
The four males are not necessarily roommates and they aren't necessarily washing the dishes before their guests arrive.
exists p1 x1 x5 x11.(n_room(x11) & n_room(x5) & exists e1 e2 x2 x3 x4 x6 x7 x8 x9 x10.((x1 = x2) & with(e2,x10) & to(x10,x11) & n_back(x10) & of(x10,x9) & n_thing(x9) & Theme(e2,x7) & Actor(e2,x6) & v_wash(e2) & in(x7,x8) & n_kitchen(x8) & n_dish(x7) & (x2 = x6) & with(e1,x4) & to(x4,x5) & n_back(x4) & of(x4,x2) & n_thing(x2) & Actor(e1,x3) & v_stand(e1) & (x2 = x3) & n_male(x2) & card_eq_4(x2)))
exists e1 p1 x1 x2 x3.(exists e2.(Actor(e2,x3) & v_arrive(e2)) & n_guest(x3) & of(x3,x1) & n_thing(x1) & before(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_wash(e1) & n_dish(x2) & n_roommate(x1))