(S (S (NP (BASENP (NNP Windsor) (NNP Castle)) (PRN (COMMA ,) (NP (BASENP (NN one)) (PP (IN of) (NP (NP (NP (BASENP (NNP Queen) (NNP Elizabeth) (NNP II)) (PP (IN of) (BASENP (DT the) (NNP United) (NNP Kingdom)))) (POS 's)) (BASENP (JJ official) (NNS residences))))) (COMMA ,))) (VP (VBZ is) (S (VP (TO to) (VP (VB get) (BASENP (DT a) (JJ hydro-electric) (NN power) (NN scheme))))))) (PERIOD .))