(S (S (BASENP (NNP Mr.) (NNP Chibitty)) (VP (VBD served) (PP (IN with) (NP (NP (BASENP (DT the) (NN rank)) (PP (IN of) (BASENP (DT a) (NNP Corporal)))) (PP (IN in) (NP (BASENP (DT the) (JJ 4th) (NNP Infantry) (NNP Division)) (SBAR (WHNP (WDT that)) (S (VP (VBD engaged) (PP (IN in) (NP (BASENP (DT the) (NN breakthrough)) (PP (IN of) (NP (BASENP (DT the) (NNP Siegfried) (NN line)) (PP (IN in) (BASENP (NNP Hurtgen) (NNP Forest)))))))))))))))) (PERIOD .))