People looking at street vendors clothes.
The vendors are not selling anything.
A vendor cannot be selling clothes and not be selling anything.
exists e1 x1 x2 x3 x4.(at(e1,x2) & n_clothes(x2) & of(x2,x4) & n_vendor(x4) & of(x2,x3) & n_street(x3) & Actor(e1,x1) & v_look(e1) & n_people(x1))
exists x1.(n_vendor(x1) & -all x2.(n_thing(x2) -> exists e1.(Theme(e1,x2) & Actor(e1,x1) & v_sell(e1))))