A chubby woman with her boyfriend.
The gay couple walks down the street.
A woman and her boyfriend is not the same thing as a gay couple.
exists s1 x1 x2.(a_topic(x1) & with(x1,x2) & n_boyfriend(x2) & of(x2,x1) & n_female(x1) & n_woman(x1) & a_chubby(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(n_street(x2) & n_couple(x1) & a_gay(s1) & Theme(s1,x1) & down(e1,x2) & Actor(e1,x1) & v_walk(e1))