Two little girls in matching dresses pose with two little boys in matching outfits.
Four children are singing.
One doesn't have to be singing to pose.
exists e1 e2 s1 s2 s3 x1 x2 x3 x4.(with(e1,x3) & in(x3,x4) & n_outfit(x4) & Actor(e2,x4) & v_match(e2) & n_boy(x3) & a_little(s3) & Theme(s3,x3) & card_eq_2(x3) & Actor(e1,x1) & v_pose(e1) & in(x1,x2) & n_dress(x2) & a_matching(s2) & Theme(s2,x2) & n_girl(x1) & a_little(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_sing(e1) & n_child(x1) & card_eq_4(x1))