The boy with the blue helmet is playing with other boy.
Two boys are riding bikes.
Not all playing means riding bikes.
exists e1 s1 x1 x2 x3.(n_boy(x3) & n_helmet(x2) & a_blue(s1) & Theme(s1,x2) & with(e1,x1) & -(x1 = x3) & n_boy(x1) & n_boy(x1) & Actor(e1,x1) & v_play(e1) & with(x1,x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_boy(x1) & card_eq_2(x1))