A variety of art displayed on the city streets.
Art is being displayed outside.
If something is on the city streets, it has to be outside.
exists e1 x1 x2 x3 x4.(n_street(x3) & of(x3,x4) & n_city(x4) & on(e1,x3) & Theme(e1,x1) & v_display(e1) & of(x1,x2) & n_art(x2) & n_variety(x1))
exists e1 s1 x1.(a_outside(s1) & Manner(e1,s1) & Theme(e1,x1) & v_display(e1) & n_art(x1))