A group of people wearing helmets and riding on bikes.
The group is headed to lunch.
It is not sure whether they headed to lunch, they can go anywhere else.
exists e2 e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & on(e2,x6) & n_bike(x6) & Actor(e2,x5) & v_ride(e2) & (x1 = x5) & Theme(e1,x4) & Actor(e1,x3) & v_wear(e1) & n_helmet(x4) & (x1 = x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 x1 x2.(n_group(x1) & to(e1,x2) & n_lunch(x2) & Theme(e1,x1) & v_head(e1))