people are riding motorcycles in a circle.
bikers ride in a show.
Riding does not imply it is in a show.
exists e1 x1 x2 x3.(in(e1,x3) & n_circle(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & n_people(x1))
exists e1 x1 x2.(in(e1,x2) & n_show(x2) & Actor(e1,x1) & v_ride(e1) & n_biker(x1))