A woman with a cart of vegetables.
A man at a farmers market.
A woman with a cart of vegetables is not necessarily at a farmers market.
exists x1 x2 x3.(a_topic(x1) & with(x1,x2) & of(x2,x3) & n_vegetable(x3) & n_cart(x2) & n_woman(x1))
exists x1 x2 x3.(a_topic(x1) & at(x1,x2) & n_market(x2) & of(x2,x3) & n_farmer(x3) & n_man(x1))