A person wearing a black, white, and yellow uniform is doing a jump on a dirt bike.
A biker shows off for the crowd at the exhibition.
Just because a biker does a jump does not mean he shows off for the crowd at the exhibition.
exists e1 e2 s1 s2 s3 s4 s5 x1 x2 x3 x4 x5 x6.(Theme(e2,x4) & Actor(e2,x1) & v_do(e2) & on(x4,x5) & n_bike(x5) & of(x5,x6) & n_dirt(x6) & n_jump(x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_uniform(x3) & a_yellow(s5) & Theme(s5,x3) & a_,(s4) & Theme(s4,x3) & a_white(s3) & Theme(s3,x3) & a_,(s2) & Theme(s2,x3) & a_black(s1) & Theme(s1,x3) & (x1 = x2) & n_person(x1))
exists e1 s1 x1 x2 x3.(n_exhibition(x3) & n_crowd(x2) & a_off(s1) & Manner(e1,s1) & for(e1,x2) & at(x2,x3) & Actor(e1,x1) & v_show(e1) & n_biker(x1))