The man is on a black and white bike.
The man is going to be in a bicycle race.
Sitting on a bike does not imply that he is going to be in a bicycle race.
exists p1 x1.(n_man(x1) & exists s1 s2 x2.(on(x1,x2) & n_bike(x2) & a_white(s2) & Theme(s2,x2) & a_black(s1) & Theme(s1,x2)))
exists e1 p1 x1.(n_man(x1) & Topic(e1,p1) & Actor(e1,x1) & v_go(e1) & exists p2 x2 x3.(in(x1,x2) & n_race(x2) & of(x2,x3) & n_bicycle(x3)))