A couple kiss in a subway station.
A couple is kissing to celebrate their anniversary in a subway station.
the fact that the couple is kissing does not imply that they are doing so to celebrate their anniversary
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x3) & n_station(x3) & of(x3,x4) & n_subway(x4) & n_kiss(x1) & of(x1,x2) & n_couple(x2))
exists e1 p1 x1 x2.(Topic(e1,p1) & Actor(e1,x1) & v_kiss(e1) & exists e2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_celebrate(e2) & in(x2,x3) & n_station(x3) & of(x3,x4) & n_subway(x4)) & n_anniversary(x2) & of(x2,x1) & n_thing(x1) & n_couple(x1))