A black man purchasing goods at a market.
A man is buying stuff.
A black man is a man. Purchasing goods is buying stuff.
exists s1 x1 x2 x3 x4.(a_topic(x1) & at(x1,x4) & n_market(x4) & n_goods(x1) & of(x1,x3) & n_purchasing(x3) & of(x1,x2) & n_man(x2) & a_black(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_buy(e1) & n_stuff(x2) & n_man(x1))