A horse bucking a cowboy in a rodeo
A person is riding in a rodeo.
If your riding in a rodeo then a horse bucking a cowboy is the same thing at a rodeo
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_rodeo(x4) & Theme(e1,x3) & Actor(e1,x2) & v_buck(e1) & n_cowboy(x3) & (x1 = x2) & n_horse(x1))
exists e1 x1 x2.(in(e1,x2) & n_rodeo(x2) & Actor(e1,x1) & v_ride(e1) & n_person(x1))