Hi,
On 05.04.2017 19:07, Stas Malyshev wrote:
> 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
Thank you, the hint helped. (I forgot to remove the P106 and P39, they
are some remains from the system)
Best,
Anatoly Zelenin
_______________________________________________
Wikidata mailing list
[email protected]
https://lists.wikimedia.org/mailman/listinfo/wikidata
