Two students kissing at a crosswalk.
Two students greeting each other.
Not all kissing are greeting each other.
exists e1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_crosswalk(x3) & Actor(e1,x2) & v_kiss(e1) & (x1 = x2) & n_student(x1) & card_eq_2(x1))
exists x1 x2.(a_topic(x1) & all x3.(n_other(x3) -> exists e1.(Theme(e1,x3) & Actor(e1,x2) & v_greet(e1))) & (x1 = x2) & n_student(x1) & card_eq_2(x1))