It was a time when the Jews of Europe were being slaughtered , and he harbored thoughts of returning to Poland to study .
Europe /location/location/contains Poland
PRP VBD DT NN WRB DT NNPS IN NNP VBD VBG VBN , CC PRP VBD NNS IN VBG TO NNP TO VB .
Europe
LOCATION
Poland
LOCATION
/location/location/contains