A man and woman sitting on a parked car.
A man and a woman are having a serious talk.
Not all serious talks take place between people sitting on parked cars.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(s1) & on(e1,x4) & n_car(x4) & a_parked(s2) & Theme(s2,x4) & Actor(e1,x3) & v_sit(e1) & (s1 = x3) & n_woman(x2) & n_man(x1) & subset_of(x2,s1) & subset_of(x1,s1))
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_have(e1) & n_talk(x4) & a_serious(s1) & Theme(s1,x4) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))