query-7cfa7966099ba893b0716e2fccce4667

rq turtle/ttl

Born in January of a leap yearMe again. I'm looking for people born in January of a leap year. Two issues: value. What's going on here??itemLabel but that seems to break the ?year rdfs:label ?yearname .I'm fishing out the label for the leap year My (commented out) comparison of the Label for a leap year, with the year of birth, breaks things.

Use at

• https://query.wikidata.org/sparql

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT ?item ?itemLabel ?dob ?dobmonth ?dobyear ?strdobyear ?year ?yearname
WHERE 
{
  ?item wdt:P31 wd:Q5. # human
  ?item wdt:P569 ?dob. # with a DoB
  ?item wdt:P106 wd:Q82955. # politician - cut down the result set size
  ?item wdt:P27 wd:Q145. #British - ditto
  bind(year(?dob) as ?dobyear) # get the year
  bind(month(?dob) as ?dobmonth) # get the month
  filter(?dobmonth=1) # Only interested in January births
  bind(str(?dobyear) as ?strdobyear) # just in case ?dobyear is an int

#  ?year wdt:P31 wd:Q19828. # year is a leap year
#  filter(?yearname=?strdobyear) #DoB year is a leap year

  SERVICE wikibase:label { 
    bd:serviceParam wikibase:language "en".
    ?year rdfs:label ?yearname .
  }
}

Query found at

• https://www.wikidata.org/wiki/Wikidata:Request_a_query/Archive/2018/01