The back side of a woman standing on a city sidewalk.
The woman's back side is seen on the city sidewalk while she talks to her friend.
Just because a woman is facing away doesn't infer that she talks to her friend. .
exists e1 s1 x1 x2 x3 x4 x5.(n_side(x1) & a_back(s1) & Theme(s1,x1) & a_topic(x1) & of(x1,x2) & on(e1,x4) & n_sidewalk(x4) & of(x4,x5) & n_city(x5) & Actor(e1,x3) & v_stand(e1) & (x2 = x3) & n_woman(x2))
exists e1 p1 s1 x1 x2 x3 x4 x5.(n_friend(x5) & of(x5,x1) & n_female(x1) & n_female(x1) & n_sidewalk(x3) & of(x3,x4) & n_city(x4) & n_side(x2) & a_back(s1) & Theme(s1,x2) & of(x2,x1) & n_woman(x1) & exists e2.(to(e2,x5) & Actor(e2,x1) & v_talk(e2)) & while(e1,p1) & on(e1,x3) & Theme(e1,x2) & v_see(e1))