A white dog and two black dogs playing
Three dogs siblings playing.
A white dog and two black dogs playing does not mean they are siblings
exists e1 s1 s2 s3 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_dog(x2) & a_black(s3) & Theme(s3,x2) & card_eq_2(x2) & subset_of(x1,s1) & n_dog(x1) & a_white(s2) & Theme(s2,x1))
exists e1 x1 x2.(Actor(e1,x1) & v_play(e1) & n_sibling(x1) & of(x1,x2) & n_dog(x2) & card_eq_3(x1))