A orange, white, and black motorcyclist racing.
A man races a motorcycle.
Not all motorcyclists are a man.
exists s1 s2 s3 x1 x2 x3 x4.(a_topic(s1) & subset_of(x3,s1) & n_racing(x3) & of(x3,x4) & n_motorcyclist(x4) & a_black(s3) & Theme(s3,x3) & subset_of(x1,s1) & Theme(s2,x2) & a_white(s2) & (x1 = x2) & n_orange(x1))
all x1.(n_motorcycle(x1) -> exists x2 x3.(a_topic(x2) & for(x2,x1) & n_race(x2) & of(x2,x3) & n_man(x3)))