Children having a pillow fight.
At the party the children have a pillow fight.
Children can have a pillow fight at any time not just a party.
exists e1 x1 x2 x3.(ne_nam_children(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_fight(x2) & of(x2,x3) & n_pillow(x3))
exists e1 x1 x2 x3 x4.(n_party(x4) & n_child(x1) & at(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_fight(x2) & of(x2,x3) & n_pillow(x3))