VIAF ID

http://www.wikidata.org/prop/statement/value-normalized/P214

Used as a Predicate in:

Schema Name	Schema Link
author	https://www.wikidata.org/wiki/EntitySchema:E42
volcano	https://www.wikidata.org/wiki/EntitySchema:E80

Used as an Object in:

Schema Name	Schema Link
author	https://www.wikidata.org/wiki/EntitySchema:E42