People stand on a sidewalk outside of retail stores.
People were window shopping
Just being on a sidewalk outside of stores doesn't mean you have to be window shopping.
exists e1 s1 x1 x2 x3 x4.(on(e1,x2) & of(x3,x4) & n_store(x4) & a_retail(s1) & Theme(s1,x4) & outside(x2,x3) & n_thing(x3) & n_sidewalk(x2) & Actor(e1,x1) & v_stand(e1) & n_people(x1))
exists p1 x1.(exists x2 x3.((x1 = x2) & n_shopping(x2) & of(x2,x3) & n_window(x3)) & n_people(x1))