(S (S (PP (IN In) (BASENP (NNP World) (NNP War) (NNP II))) (COMMA ,) (S (BASENP (DT the) (NN castle)) (VP (VBD was) (NP (BASENP (DT the) (NN base)) (PP (IN for) (NP (BASENP (DT a) (NNP Naval) (NN hospital)) (CC and) (NP (BASENP (NN squadron)) (PP (IN of) (BASENP (JJ amphibious) (NNS biplanes)))))))))) (PERIOD .))