A man and a woman kissing.
A couple shares their very first kiss.
Just because a man and woman are kissing doesn't mean they are a couple or that it's their very first kiss.
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 s1 x1 x2 x3 x4 x5.(a_topic(x1) & Time(s1,x5) & n_kiss(x5) & r_very(s1) & Theme(s1,x4) & a_first(s1) & (x1 = x4) & Time(x1,x3) & n_their(x3) & Time(x1,x2) & n_share(x2) & n_couple(x1))