A child is sliding down a hill on a sled.
The child was sliding down the hill at a really fast speed.
The child could have been sliding down the hill on something other than a sled.
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 s1 s2 x1 x2 x3.(n_hill(x2) & n_child(x1) & at(e1,x3) & n_speed(x3) & a_fast(s2) & Theme(s2,x3) & r_really(x3) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_slide(e1))