A child is sliding down a hill on a sled.
A child rides a sled.
A sled can be considered a method of transportation or movement, and therefore can be ridden.
exists e1 s1 x1 x2 x3.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_slide(e1) & on(x2,x3) & n_sled(x3) & n_hill(x2) & n_child(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_sled(x2) & n_child(x1))