This man is in a bicycle race.
The man is in a car race.
A bicycle race is not a car race.
exists p1 x1.(n_man(x1) & exists x2 x3.(in(x1,x2) & n_race(x2) & of(x2,x3) & n_bicycle(x3)))
exists p1 x1.(n_man(x1) & exists x2 x3.(in(x1,x2) & n_race(x2) & of(x2,x3) & n_car(x3)))