「私の息子は何のために死んだのか？」
(QT (DQL 「) (QTC (SBARQ (SBARQ (S (PP-SBJ (NP (PP (BASENP (NN 私)) (IN の)) (NN 息子)) (IN は)) (VP (PP (NP (PP (BASENP (NN 何)) (IN の)) (NN ため)) (IN に)) (VP (VBV 死ん) (VP (MD だ))))) (NN の)) (INFKB か)) (PERIOD ？)) (DQR 」))