A little girl with dark hair blowing bubbles.
A girl with dark hair is blowing bubbles.
The description little girl is more specific in detail than a girl. It's more descriptive.
exists e1 s1 s2 x1 x2 x3.(a_topic(x1) & with(x1,x2) & n_bubble(x2) & Actor(e1,x2) & v_blow(e1) & of(x2,x3) & n_hair(x3) & a_dark(s2) & Theme(s2,x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_blow(e1) & n_bubble(x3) & with(x1,x2) & n_hair(x2) & a_dark(s1) & Theme(s1,x2) & n_girl(x1))