Two little girls are sitting on a yellow rubber ball toy.
the girls are friends.
Not all girls who are playing together are friends.
exists e1 s1 s2 x1 x2 x3 x4.(on(e1,x2) & n_toy(x2) & of(x2,x4) & n_ball(x4) & of(x2,x3) & n_rubber(x3) & a_yellow(s2) & Theme(s2,x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1) & a_little(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1.(n_girl(x1) & exists x2.((x1 = x2) & n_friend(x2)))