A woman is sitting on the sidewalk, sketching an image with chalk.
A woman draws her favorite picture on the sidewalk.
Just because the woman is drawing, doesn't mean she's drawing her favorite picture. Just because a woman is sketching while sitting on the sidewalk, doesn't mean she's sketching on the sidewalk.
exists e1 e2 x1 x2 x3 x4.(n_sidewalk(x2) & for(e1,e2) & with(e2,x4) & n_chalk(x4) & Theme(e2,x3) & Actor(e2,x1) & v_sketch(e2) & n_image(x3) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_woman(x1))
exists e1 s1 x1 x2 x3.(n_sidewalk(x3) & Theme(e1,x2) & Actor(e1,x1) & v_draw(e1) & on(x2,x3) & n_picture(x2) & a_favorite(s1) & Theme(s1,x2) & of(x2,x1) & n_female(x1) & n_woman(x1))