A crowd of people watching a motorcycle event.
Motorcycles are being ridin.
I guess I have to spell it ridin.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & n_event(x4) & of(x4,x5) & n_motorcycle(x5) & (x2 = x3) & n_people(x2) & n_crowd(x1))
exists e1 x1.(Theme(e1,x1) & v_ridin(e1) & n_motorcycle(x1))