The biker in the multicolored clothing is riding fast.
a biker is riding fast
a biker in multicolored clothing is a biker, and riding fast is riding fast.
exists e1 s1 s2 x1 x2.(n_clothing(x2) & a_multicolored(s1) & Theme(s1,x2) & n_biker(x1) & a_fast(s2) & Manner(e1,s2) & Actor(e1,x1) & v_ride(e1) & in(x1,x2))
exists e1 s1 x1.(a_fast(s1) & Manner(e1,s1) & Actor(e1,x1) & v_ride(e1) & n_biker(x1))