A group of young children playing pillow fight on a bed.
A group of kids are having a sleepover.
Having a pillow fight does not imply a sleepover.
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & of(x1,x2) & on(e1,x6) & n_bed(x6) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_fight(x4) & of(x4,x5) & n_pillow(x5) & (x2 = x3) & n_child(x2) & a_young(s1) & Theme(s1,x2) & n_group(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_sleepover(x3) & of(x1,x2) & n_kid(x2) & n_group(x1))