A little girl is climbing up some very tall rocks.
A little boy is climbing up some very tall rocks.
They are stating that there is a girl climbing, and then the second sentence says there is a boy climbing.
exists e1 s1 s2 s3 x1 x2.(a_up(s3) & Manner(e1,s3) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_rock(x2) & a_tall(s2) & Theme(s2,x2) & r_very(x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1))
exists e1 s1 s2 s3 x1 x2.(a_up(s3) & Manner(e1,s3) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_rock(x2) & a_tall(s2) & Theme(s2,x2) & r_very(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))