A man and a woman kissing.
A couple kissing.
A man and a woman are a couple.
exists e1 s1 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & Actor(e1,x3) & v_kiss(e1) & (x2 = x3) & n_woman(x2) & subset_of(x1,s1) & n_man(x1))
exists x1 x2.(a_topic(x1) & n_kissing(x1) & of(x1,x2) & n_couple(x2))