Rollerbladers roll in formation down a hill.
The rollerbladers are going fast.
There is nothing to suggest that the rollerbladers are going fast.
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x3) & down(x3,x4) & n_hill(x4) & n_formation(x3) & n_roll(x1) & (x1 = x2) & ne_per_rollerbladers(x2))
exists e1 s1 x1.(n_rollerblader(x1) & a_fast(s1) & Manner(e1,s1) & Actor(e1,x1) & v_go(e1))