sentence1_binary_parse: ( Examples ( of ( Psychoactive Drugs ) ) )
sentence1_parse: (ROOT (NP (NP (NNS Examples)) (PP (IN of) (NP (NNP Psychoactive) (NNPS Drugs)))))
sentence1: Examples of Psychoactive Drugs
sentence2_parse: (ROOT (S (NP (NN Caffeine) (CC and) (NN alcohol)) (VP (VBP are) (NP (NP (CD two) (NNS examples)) (PP (IN of) (NP (DT a) (NN psychoactive))))) (. .)))
sentence2: Caffeine and alcohol are two examples of a psychoactive.