<http://rdf.freebase.com/ns/en.required> <http://rdf.freebase.com/ns/type.object.key> _:htpmZONt266.
<http://rdf.freebase.com/ns/en.required> <http://creativecommons.org/ns#attributionURL> <http://www.freebase.com/view/en/required>.
<http://rdf.freebase.com/ns/en.required> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://rdf.freebase.com/ns/common.topic>.
<http://rdf.freebase.com/ns/en.required> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://rdf.freebase.com/ns/freebase.metaweb_api_argument_type>.
<http://rdf.freebase.com/ns/en.required> <http://creativecommons.org/ns#attributionName> "Source: Freebase - The World's database".
<http://rdf.freebase.com/ns/en.required> <http://www.w3.org/1999/xhtml/vocab#license> <http://creativecommons.org/licenses/by/3.0/>.
<http://rdf.freebase.com/ns/en.required> <http://rdf.freebase.com/ns/type.object.name> "Required"@en.
_:htpmZONt266 <http://rdf.freebase.com/ns/type.value.value> "required".
_:htpmZONt266 <http://rdf.freebase.com/ns/type.key.namespace> <http://rdf.freebase.com/ns/en>.