Two females sitting on a stairwell in a mostly white tiled building.
Two females sit on the stairs.
sitting on a stairwell is rephrasing of sit on the stairs.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_building(x4) & a_tiled(s2) & Theme(s2,x4) & a_white(s1) & Theme(s1,x4) & r_mostly(x4) & on(e1,x3) & n_stairwell(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_female(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_stair(x2) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_female(x1) & card_eq_2(x1))