A group of people riding on motorcycles down the road wearing helmets.
The people are wearing helmets
if they are on motorcycles wearing helmets then they are wearing helmets.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(n_road(x5) & a_topic(x1) & of(x1,x2) & down(e1,x5) & Theme(e2,x7) & Actor(e2,x6) & v_wear(e2) & n_helmet(x7) & (x5 = x6) & on(e1,x4) & n_motorcycle(x4) & Actor(e1,x3) & v_ride(e1) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_helmet(x2))