Four children are having a pillow fight.
Four children are having a pillow fight for their friends birthday surprise.
Having a pillow fight does not imply it being for their friends birthday surprise.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_fight(x2) & of(x2,x3) & n_pillow(x3) & n_child(x1) & card_eq_4(x1))
exists e1 x1 x2 x3 x4 x5 x6.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & for(x2,x4) & n_surprise(x4) & of(x4,x6) & n_birthday(x6) & of(x4,x5) & n_friend(x5) & of(x4,x1) & n_thing(x1) & n_fight(x2) & of(x2,x3) & n_pillow(x3) & n_child(x1) & card_eq_4(x1))