Some were infamously exposed to radioactive , carcinogenic and hallucinogenic chemicals at the Holmesburg prison in Philadelphia .
Holmesburg /location/neighborhood/neighborhood_of Philadelphia
Philadelphia /location/location/contains Holmesburg
DT VBD RB VBN TO JJ , JJ CC JJ NNS IN DT NNP NN IN NNP .
Holmesburg
LOCATION
Philadelphia
LOCATION
/location/neighborhood/neighborhood_of
Philadelphia
LOCATION
Holmesburg
LOCATION
/location/location/contains