People walking and a lady looking at her cellphone while walking in a big city shopping.
A woman is in a big city
Stores found in big city shopping don't always have to be in a big city.  These stores can also be found in smaller cities.
exists e1 e2 e3 s1 x1 x2 x3 x4 x5.(while(e2,e3) & in(e3,x4) & n_shopping(x4) & of(x4,x5) & n_city(x5) & a_big(s1) & Theme(s1,x4) & Actor(e3,x2) & v_walk(e3) & at(e2,x3) & n_cellphone(x3) & of(x3,x1) & n_female(x1) & Actor(e2,x2) & v_look(e2) & n_lady(x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists p1 x1.(exists s1 x2.(in(x1,x2) & n_city(x2) & a_big(s1) & Theme(s1,x2)) & n_woman(x1))