A motorcycle racer going down a steep, dirt hill.
The racer is going down a hill.
A motorcycle racer going down a steep, dirt hill is more generally also a race going down a hill.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x4) & Actor(e1,x3) & v_go(e1) & n_hill(x4) & of(x4,x6) & n_dirt(x6) & a_,(s1) & Theme(s1,x4) & of(x4,x5) & n_steep(x5) & (x1 = x3) & n_racer(x1) & of(x1,x2) & n_motorcycle(x2))
exists e1 s1 x1 x2.(n_racer(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_hill(x2))