A man on a motorbike is leading a horse that is giving someone a ride.
Someone is riding a horse bareback.
person riding the horse need not be bareback
exists e1 e2 x1 x2 x3 x4 x5 x6.(Theme(e2,x3) & Actor(e2,x1) & v_lead(e2) & Recipient(e1,x6) & Theme(e1,x5) & Actor(e1,x4) & v_give(e1) & n_person(x6) & n_ride(x5) & (x3 = x4) & n_horse(x3) & on(x1,x2) & n_motorbike(x2) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bareback(x2) & of(x2,x3) & n_horse(x3) & n_person(x1))