Two children, a boy and a girl, are playing outside in the rain.
The children are siblings.
Not all children are siblings.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_rain(x6) & in(e1,x6) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1) & subset_of(x3,x1) & subset_of(x5,x3) & n_girl(x5) & subset_of(x4,x3) & n_boy(x4) & subset_of(x2,x1) & n_child(x2) & card_eq_2(x2))
exists p1 x1.(n_child(x1) & exists x2.((x1 = x2) & n_sibling(x2)))