Items are being sold in the open market by it's vendors.
Items are being sold.
Items are sold in market by 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 x1.(Theme(e1,x1) & v_sell(e1) & n_item(x1))