A Nigerian vendor displays his collection of sunglasses for sale.
A vendor displays his knockoff purses.
Sunglasses and purses are not the same type of item for sale.
(x)
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_display(e1) & n_purse(x2) & of(x2,x3) & n_knockoff(x3) & of(x2,x1) & n_male(x1) & n_vendor(x1))