The boy and girl pose for a picture with a large red flower above their heads.
The boy and girl are siblings.
Not every boy and girl pairs are siblings.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(n_head(x6) & of(x6,x2) & n_thing(x2) & n_girl(x3) & n_boy(x2) & subset_of(x3,x1) & subset_of(x2,x1) & for(e1,x4) & with(x4,x5) & above(x5,x6) & n_flower(x5) & a_red(s2) & Theme(s2,x5) & a_large(s1) & Theme(s1,x5) & n_picture(x4) & Actor(e1,x1) & v_pose(e1))
exists p1 x1 x2 x3.(n_girl(x3) & n_boy(x2) & subset_of(x3,x1) & subset_of(x2,x1) & exists x4.((x1 = x4) & n_sibling(x4)))