A BMX bike rider in red clothing and a helmet is riding his bike next to a wooden fence.
The rider in blue clothing was not wearing a helmet when riding.
The biker can not be in both red and blue. And he can be either with or without a helmet.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6 x7.(to(e1,x7) & n_fence(x7) & a_wooden(s2) & Theme(s2,x7) & r_next(e1) & Theme(e1,x4) & Actor(e1,x1) & v_ride(e1) & n_bike(x4) & n_bike(x4) & of(x4,x2) & n_male(x2) & subset_of(x6,x1) & n_helmet(x6) & subset_of(x2,x1) & in(x2,x5) & n_clothing(x5) & a_red(s1) & Theme(s1,x5) & n_rider(x2) & of(x2,x4) & (x2 = x3) & ne_org_bmx(x3))
exists s1 x1 x2.(n_rider(x1) & -exists e1 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_when(x3) & Time(x3,x4) & n_riding(x4) & n_helmet(x3)) & in(x1,x2) & n_clothing(x2) & a_blue(s1) & Theme(s1,x2))