query-b24feb962201049d8aefefe9bf2eeae4

rq turtle/ttl

average number of references on “date of death” statements

(note: number of references, not reference snaks; arithmetic mean, not median)

SELECT (AVG(?count) AS ?avgCount) WHERE { { SELECT (COUNT(?reference) AS ?count) WHERE { [] p:P570 ?statement. OPTIONAL { ?statement prov:wasDerivedFrom ?reference. } } GROUP BY ?statement } }

Use at

• https://query.wikidata.org/sparql

PREFIX prov: <http://www.w3.org/ns/prov#>
PREFIX p: <http://www.wikidata.org/prop/>
# average number of references on “date of death” statements
# (note: number of references, not reference snaks; arithmetic mean, not median)
SELECT (AVG(?count) AS ?avgCount) WHERE {
  {
    SELECT (COUNT(?reference) AS ?count) WHERE {
      [] p:P570 ?statement.
      OPTIONAL { ?statement prov:wasDerivedFrom ?reference. }
    }
    GROUP BY ?statement
  }
}

Query found at

• https://www.wikidata.org/wiki/User:Charles_Matthews/Queries