(S (S (PP-SBJ (BASENP (NN 医者)) (IN は)) (COMMA 、) (VP (SBAR (SBAR (S (PP-SBJ (BASENP (NN 彼)) (IN が)) (VP (PP-OBJ (NP (S (PP-SBJ (BASENP (NN 妻)) (IN が)) (VP (PP-OBJ (BASENP (NN 攻撃)) (IN を)) (VP (VBV 生き延び) (VP (MDV なかっ) (VP (MD た)))))) (NN こと)) (IN を)) (VP (VP (VBV 知っ) (INTE て)) (VP (VBV い) (VP (MD た)))))) (INFKB か)) (ADVP (RB どう) (INFKB か))) (VP (VBO 気付か) (VP (MDV なかっ) (VP (MD た)))))) (PERIOD 。))
医者 は 、 彼 が 妻 が 攻撃 を 生き延び なかっ た こと を 知っ て い た か どう か 気付か なかっ た 。
Doctors were unaware if he knew that his wife did not survive the attack .