:
http://guava.iis.sinica.edu.tw/r4r/
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RRPolicy
http://guava.iis.sinica.edu.tw/r4r/RRPolicy
rdfs:label
http://www.w3.org/2000/01/rdf-schema#label
r4r:RRPolicy
@en
graph:default
https://triplydb.com/odw/voc/graphs/default