(S (S (NP (BASENP (DT An) (NN aircraft)) (VP (VBG dating) (ADVP (RB back) (PP (TO to) (BASENP (DT the) (NNP Second) (NNP World) (NNP War)))))) (VP (VBZ has) (VP (VP (VP (VBN crashed) (PP (IN at) (NP (BASENP (NNP Shoreham) (NNP Airshow)) (PP (IN in) (NP (BASENP (NNP West) (NNP Sussex)) (COMMA ,) (BASENP (NNP United) (NNP Kingdom))))))) (SBAR (IN whilst) (S (VP (VBG participating) (PP (IN in) (BASENP (DT a) (JJ mock) (NN dogfight))))))) (COMMA ,) (S (VP (VBG killing) (BASENP (DT the) (NN pilot))))))) (PERIOD .))