query-2b691c7dc7325098a121752ba6c80d33

rq turtle/ttl

Propertiesinstance of (P31)number of children (P1971)date of birth (P569) Propertiesinstance of (P31)number of children (P1971)date of birth (P569) Propertiesinstance of (P31)number of children (P1971)date of birth (P569) Propertiesinstance of (P31)number of children (P1971)date of birth (P569) Propertiesinstance of (P31)number of children (P1971)date of birth (P569) Propertiesinstance of (P31)number of children (P1971)date of birth (P569) Propertiesinstance of (P31)number of children (P1971)date of birth (P569) Propertiesinstance of (P31)number of children (P1971)date of birth (P569) Propertiesinstance of (P31)number of children (P1971)date of birth (P569) Propertiesinstance of (P31)number of children (P1971)date of birth (P569)

Use at

PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
#defaultView:LineChart
SELECT  (str(?year) AS ?year) (AVG( ?_number_of_children ) AS ?count) WHERE {
  ?item wdt:P31 wd:Q5.
  ?item wdt:P1971 ?_number_of_children.
  ?item wdt:P569 ?_date_of_birth.
  BIND( year(?_date_of_birth) as ?year ).
  FILTER( ?year > 1900)
}

GROUP BY ?year

Query found at