Wikidata SPARQL - get company entities and the location of their headquarters - sparql

Question

I'm having trouble extracting location attributes of company HQ's.
My query: finds all companies or sub-classes, and returns some basic properties such as ISIN and URL, and the Headquarter location.
I have tried to use this example to extend the Headquarter part of the query to return location information such as city, country, and coordinate latitude and longitude. However I am getting stuck on pulling the values or labels through.
Thank you
SELECT
?item ?itemLabel ?web ?isin ?hq ?hqloc ?inception
# valueLabel is only useful for properties with item-datatype
WHERE
{
?item p:P31/ps:P31/wdt:P279* wd:Q783794.
OPTIONAL{?item wdt:P856 ?web.} # get item
OPTIONAL{?item wdt:P946 ?isin.} # get item
OPTIONAL{?item wdt:P571 ?inception.} # get item
OPTIONAL{?item wdt:P159 ?hq.}
OPTIONAL{?item p:P159 ?hqItem. # get property
?hqItem ps:P159 wd:Q515. # get property-statement wikidata-entity
?hqItem pq:P17 ?hqloc. # get country of city
}
?article schema:about ?item .
?article schema:inLanguage "en" .
?article schema:isPartOf <https://en.wikipedia.org/>.
SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
}
LIMIT 10

Answer 1

A more simplified query to select some of the values you mentioned:
SELECT
?company ?companyLabel ?isin ?web ?country ?countryLabel ?inception
WHERE
{
?article schema:inLanguage "en" .
?article schema:isPartOf <https://en.wikipedia.org/>.
?article schema:about ?company .
?company p:P31/ps:P31/wdt:P279* wd:Q783794.
?company wdt:P946 ?isin.
OPTIONAL {?company wdt:P856 ?web.}
OPTIONAL {?company wdt:P571 ?inception.}
OPTIONAL {?company wdt:P17 ?country.}
SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
} LIMIT 10
What I changed:
changed some labels to be more explicit (ex: "?item" -> "?company")
usage of P17 to directly select the country
I removed the OPTIONAL on ISIN to show that there exist some values. You did not get a result because it seems that many company instances on Wikidata lack that information.
From here, selecting the other values should be easy.