Art Dealers and Art Historians: Authorities Identifiers by the Numbers

Linked Open Data queries need authoritative identifiers to work across platforms.

QUESTION: Which are the most used identifiers for art dealers, art historians, art dealers and art collectors who exist in Wikidata?

Below are Wikidata Sparql Queries that show the authorities that are most used for referencing art dealers and art historians in Wikidata.

(VIAF wins hands down.) 

ART DEALERS : VIAF, LCCN, RKD...




ART HISTORIANS





ART COLLECTORS











Wikidata Query for Most Used Identifiers for Art Dealers

SELECT ?propertyLabel ?propertyDescription ?count WHERE {
{
SELECT ?propertyclaim (COUNT(*) AS ?count) WHERE {
?item wdt:P106 wd:Q173950.
?item wdt:P31 wd:Q5.
?item ?propertyclaim _:b2.
}
GROUP BY ?propertyclaim
}
?property wikibase:propertyType wikibase:ExternalId.
?property wdt:P31 wd:Q19595382.
?property wikibase:claim ?propertyclaim.
SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
}
ORDER BY DESC(?count)
LIMIT 100