a man walking away from an escalator while a woman is coming up the escalator.
A man and women are sitting on a couch.
A man and a woman cannot be sitting on a couch, walking, and using escalators all at the same time.
exists e1 p1 x1 x2 x3.(a_topic(x1) & exists e2 s1 x4.(Time(e2,x3) & a_up(s1) & Manner(e2,s1) & Actor(e2,x4) & v_come(e2) & n_woman(x4)) & n_escalator(x3) & n_escalator(x3) & while(e1,p1) & from(e1,x3) & r_away(e1) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_couch(x4) & Actor(e1,x1) & v_sit(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))