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)))))) (: ...)))
There are a lot of giggling high school girls.
( There ( ( are ( ( a lot ) ( of ( giggling ( high ( school girls ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (DT a) (NN lot)) (PP (IN of) (S (VP (VBG giggling) (NP (JJ high) (NN school) (NNS girls))))))) (. .)))