(S (S (BASENP (PRP He)) (VP (VBD said) (SBAR (IN that) (S (NP (NP (DT the) (NP (QT (DQL ``) (ADJP (RB mentally) (JJ draining)) (DQR '')) (BASENP (NN living) (NNS conditions)))) (PP (IN of) (BASENP (DT the) (NN combat) (NN unit)))) (VP (VBD was) (BASENP (DT a) (NN factor))))))) (PERIOD .))