People are walking around booths that are selling things.
The booths have nothing for sale.
Booths cannot be selling things if they have nothing for sale.
exists e2 e1 x1 x2 x3 x4.(around(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_sell(e2) & n_thing(x4) & (x2 = x3) & n_booth(x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists x1.(n_booth(x1) & -exists e1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & for(x2,x3) & n_sale(x3) & n_thing(x2)))