<http://webisa.webdatacommons.org/prov/244097738> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/316346728> . <http://webisa.webdatacommons.org/316346728> <http://www.w3.org/ns/prov#wasQuotedFrom> <huffingtonpost.com> . <http://webisa.webdatacommons.org/316346728> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/316346728> <http://www.w3.org/ns/prov#value> "Santorum has also criticized the public education system and prestigious universities such as Harvard -- institutions that he called indoctrination centers for the left, according to David Halperin, a senior fellow at United Republic, a nonprofit group that aims to counter the influence of well-heeled special interest groups in politics." .