(S (S (BASENP (NNP Heim)) (VP (VP (VP (VBD worked) (PP (IN as) (BASENP (DT a) (NN doctor)))) (PP (IN in) (NP (NP (BASENP (DT a) (NN number)) (PP (IN of) (BASENP (NNP Nazi) (NNP Germany) (NN concentration) (NNS camps)))) (PRN (LRB -LRB-) (NP (NP (BASENP (NNP Mauthausen)) (COMMA ,) (BASENP (NNP Sachsenhausen))) (CC and) (BASENP (NNP Buchenwald))) (RRB -RRB-))))) (S (VP (VP (VP (VBG carrying) (PRT (RP out))) (NP (BASENP (DT a) (NN series)) (PP (IN of) (BASENP (NNS experiments))))) (PP (IN on) (NP (BASENP (DT the) (NN camp) (POS 's)) (BASENP (JJ Jewish) (NNS inmates)))))))) (PERIOD .))