The middle of the town and townspeople.
The people belong to the town.
People can be in a town and not belong to the town.
exists x1 x2 x3 x4.(n_town(x3) & n_middle(x1) & a_topic(x1) & of(x1,x2) & subset_of(x4,x2) & n_townspeople(x4) & subset_of(x3,x2))
exists e1 x1 x2.(n_town(x2) & n_people(x1) & to(e1,x2) & Actor(e1,x1) & v_belong(e1))