There is a little blond-hair girl with a green sweatshirt and a red shirt playing on a playground.
The young girl is wearing purple snow pants, helping her father shovel the front steps of their house
Sentence 1 states the girl is little   Sentence 2 states the girl is young.  If the girl is young, she may or may not be little.  Sentence 1 states she is in a green sweatshirt and a rad shirt.  Sentence 2 has different clothing of purple show pants.  Sentence does not mention if she has snow pants on and sentence 2 does not mention a sweatshirt or a shirt.  Sentence 1 states she is playing which is different action from sentence 2 which states she is helping.  Sentence 1 states she is on a playground. Sentence 2 states she in on the front steps of her house which is not the playground.
exists p1 x1 e1 s1 s2 s3 s4 x2 x3 x4 x5 x6 x7.((x1 = x2) & with(x2,x3) & subset_of(x5,x3) & on(e1,x7) & n_playground(x7) & Actor(e1,x6) & v_play(e1) & (x5 = x6) & n_shirt(x5) & a_red(s4) & Theme(s4,x5) & subset_of(x4,x3) & n_sweatshirt(x4) & a_green(s3) & Theme(s3,x4) & n_girl(x2) & a_blond-hair(s2) & Theme(s2,x2) & a_little(s1) & Theme(s1,x2))
exists e2 e1 e3 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(n_father(x7) & of(x7,x1) & n_female(x1) & n_house(x6) & of(x6,x1) & n_thing(x1) & n_step(x5) & a_front(s3) & Theme(s3,x5) & n_girl(x1) & a_young(s1) & Theme(s1,x1) & for(e2,e3) & Theme(e3,x7) & Actor(e3,x1) & v_help(e3) & Theme(e2,x5) & Actor(e2,x1) & v_shovel(e2) & of(x5,x6) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_pants(x3) & of(x3,x4) & n_snow(x4) & a_purple(s2) & Theme(s2,x3) & (x1 = x2))