Hi!
> Hi all,
> I am building a Question Answering System for Wikidata (I will put the
> demo live in May) and would like to be able to ask quesitons like "Give
> me the cities in Alaska". To query Wikidata I am using the Wikidata
> SPARQL endpoint.
>
> The SPARQL query for this question looks the following way [0]:
>
> SELECT DISTINCT ?x ?xLabel
> {
> # All things in Alaska
> ?x (wdt:P131+ | wdt:P276) wd:Q797 .
> # All cities
> ?x ((wdt:P106 | wdt:P39 | wdt:P31) / wdt:P279*) wd:Q515 .
> SERVICE wikibase:label { bd:serviceParam wikibase:language "en" . }
> }
I'm not sure why you are using P106 or P39 for cities. If some data has
it, it's almost certainly an error - city can not hold a position or
have an occupation. Using P276 is usually an error too.
For the query, I'd suggest this one: http://tinyurl.com/m5dtwax
--
Stas Malyshev
[email protected]
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