Two motocross bikers are performing stunts coming off of a large jump.
Two bikers are riding red motorcycles.
The motorcycles are not necessarily red.
exists e1 e2 s1 x1 x2 x3 x4 x5.(Theme(e2,x3) & Actor(e2,x1) & v_perform(e2) & of(e1,x5) & n_jump(x5) & a_large(s1) & Theme(s1,x5) & r_off(e1) & Actor(e1,x4) & v_come(e1) & (x3 = x4) & n_stunt(x3) & n_biker(x1) & of(x1,x2) & n_motocross(x2) & card_eq_2(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorcycle(x2) & a_red(s1) & Theme(s1,x2) & n_biker(x1) & card_eq_2(x1))