A child rides down the snow in a tube.
A little girl is sledding.
Sentence 1 is missing girl is sledding.
exists e1 s1 x1 x2 x3.(n_snow(x2) & in(e1,x3) & n_tube(x3) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_child(x1))
exists e1 s1 x1.(Actor(e1,x1) & v_sled(e1) & n_girl(x1) & a_little(s1) & Theme(s1,x1))