A man sits on stairs with a woman.
a man and woman are talking about a date on the stairs
Just because a man sits with a woman does not mean that she is talking about a date.
exists e1 x1 x2 x3.(with(e1,x3) & n_woman(x3) & on(e1,x2) & n_stair(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3 x4 x5.(n_stair(x5) & about(e1,x4) & on(x4,x5) & n_date(x4) & Actor(e1,x1) & v_talk(e1) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1))