some people march to the beat of a different drum 
(ROOT (S (NP (DT some) (NNS people)) (VP (VBP march) (PP (IN to) (NP (NP (DT the) (NN beat)) (PP (IN of) (NP (DT a) (JJ different) (NN drum))))))))
(ROOT (S (NP (DT ) (NNS )) (VP (VBP ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (JJ ) (NN ))))))))