hordes of giggling high school girls ...
( ( hordes ( of ( giggling ( high ( school girls ) ) ) ) ) ... )
(ROOT (NP (NP (NP (NNS hordes)) (PP (IN of) (S (VP (VBG giggling) (NP (JJ high) (NN school) (NNS girls)))))) (: ...)))
None of the girls were there.
( ( None ( of ( the girls ) ) ) ( ( were there ) . ) )
(ROOT (S (NP (NP (NN None)) (PP (IN of) (NP (DT the) (NNS girls)))) (VP (VBD were) (ADVP (RB there))) (. .)))