The lonely man in the city.
The lonely woman in the city.
There can be either a man or a woman.
exists s1 x1 x2.(n_city(x2) & n_man(x1) & a_lonely(s1) & Theme(s1,x1) & a_topic(x1) & in(x1,x2))
exists s1 x1 x2.(n_city(x2) & n_woman(x1) & a_lonely(s1) & Theme(s1,x1) & a_topic(x1) & in(x1,x2))