Items are being sold in the open market by it's vendors.
The vendors refuse to sell items to customers
Vendors cannot refuse to sell items if items are being sold by its vendors.
exists e1 p1 s1 x1 x2 x3.(n_thing(x2) & n_market(x2) & a_open(s1) & Theme(s1,x2) & Actor(e1,x2) & exists x4.((x3 = x4) & n_vendor(x4)) & (x2 = x3) & in(e1,x2) & Theme(e1,x1) & v_sell(e1) & n_item(x1))
exists e1 p1 x1.(n_vendor(x1) & Topic(e1,p1) & Actor(e1,x1) & v_refuse(e1) & exists e2 x2 x3.(to(e2,x3) & n_customer(x3) & Theme(e2,x2) & Actor(e2,x1) & v_sell(e2) & n_item(x2)))