A boy in a blue shirt and white helmet is riding a white bike.
A male is afixed atop a bicycle.
A boy is a male. In order to be riding a bike, one must be afixed atop a bicycle.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5.(Theme(e1,x5) & Actor(e1,x1) & v_ride(e1) & n_bike(x5) & a_white(s3) & Theme(s3,x5) & in(x1,x2) & n_helmet(x4) & a_white(s2) & Theme(s2,x4) & n_shirt(x3) & subset_of(x4,x2) & subset_of(x3,x2) & a_blue(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2.(atop(e1,x2) & n_bicycle(x2) & Theme(e1,x1) & v_afix(e1) & n_male(x1))