A little girl sweeps a sidewalk.
A child sweeps the sidewalk outside the bakery.
The girl could have been sweeping any sidewalk, not necessarily the one outside the bakery.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_sweep(e1) & n_sidewalk(x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_bakery(x3) & n_sidewalk(x2) & Theme(e1,x2) & Actor(e1,x1) & v_sweep(e1) & outside(x2,x3) & n_child(x1))