A cowgirl corners a barrel riding a horse.
A cowgirl is on her animal.
cowgirl riding a horse implies she is on her animal. A horse  is an animal.
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_corner(e2) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_horse(x4) & (x2 = x3) & n_barrel(x2) & n_cowgirl(x1))
exists p1 x1 x2.(on(x1,x2) & n_animal(x2) & of(x2,x1) & n_female(x1) & n_cowgirl(x1))