Women sitting on stairs talking.
Women are sitting and talking.
If women are sitting on stairs, they are sitting.
exists e2 e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & Actor(e2,x4) & v_talk(e2) & (x3 = x4) & n_stair(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_woman(x1))
exists e1 e2 x1 x2.(Actor(e2,x2) & v_talk(e2) & n_woman(x2) & Actor(e1,x1) & v_sit(e1) & n_woman(x1))