A mountain biker with a backpack crests a ridge.
The biker crested a ridge.
the biker is a mountain biker
exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_crest(e1) & n_ridge(x4) & with(x1,x3) & n_backpack(x3) & n_biker(x1) & of(x1,x2) & n_mountain(x2))
exists e1 x1 x2.(n_biker(x1) & Theme(e1,x2) & Actor(e1,x1) & v_crest(e1) & n_ridge(x2))