A person wearing a red, white, and blue helmet sitting on a motorcycle.
A human being wearing red, white, and blue is sitting on a vehicle.
A person is another word for human, and vehicle is another word that can be used to describe a motorcycle.
exists e1 e2 s1 s2 s3 s4 s5 x1 x2 x3 x4 x5.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & on(e1,x5) & n_motorcycle(x5) & Actor(e1,x4) & v_sit(e1) & (x3 = x4) & n_helmet(x3) & a_blue(s5) & Theme(s5,x3) & a_,(s4) & Theme(s4,x3) & a_white(s3) & Theme(s3,x3) & a_,(s2) & Theme(s2,x3) & a_red(s1) & Theme(s1,x3) & (x1 = x2) & n_person(x1))
exists e1 e2 p1 s1 x1 x2 x3 x4 x5.(on(e2,x5) & n_vehicle(x5) & Actor(e2,x1) & v_sit(e2) & subset_of(x4,x1) & n_blue(x4) & subset_of(x2,x1) & exists s2 s3.(Theme(s3,x3) & a_white(s3) & Theme(s2,x3) & a_red(s2)) & Topic(e1,p1) & Actor(e1,x3) & v_wear(e1) & (x2 = x3) & n_be(x2) & a_human(s1) & Theme(s1,x2))