A couple kissing on the neck on a busy street.
The couple is male and female.
A couple kissing on a busy street are not necessarily male and female.
exists e1 s1 x1 x2 x3 x4.(n_neck(x3) & a_topic(x1) & on(x1,x4) & n_street(x4) & a_busy(s1) & Theme(s1,x4) & on(e1,x3) & Actor(e1,x2) & v_kiss(e1) & (x1 = x2) & n_couple(x1))
exists s1 s2 x1.(n_couple(x1) & Theme(s2,x1) & a_female(s2) & Theme(s1,x1) & a_male(s1))