A girl bounces on a large red ball.
A boy is bouncing on a blue ball.
A girl is different than a boy, and a ball cannot be red and blue at the same time.
exists e1 s1 s2 x1 x2.(on(e1,x2) & n_ball(x2) & a_red(s2) & Theme(s2,x2) & a_large(s1) & Theme(s1,x2) & Actor(e1,x1) & v_bounce(e1) & n_girl(x1))
exists e1 s1 x1 x2.(on(e1,x2) & n_ball(x2) & a_blue(s1) & Theme(s1,x2) & Actor(e1,x1) & v_bounce(e1) & n_boy(x1))