Querying DBpedia-Live with SPARQL does not give same answer as DBpedia

问题

I want to query DBpedia with DBpedia Live endpoint.

I have this query :

SELECT *
WHERE {
?x a dbo:Person .
?x rdfs:label "Usain Bolt"@en .
}

This query gives the correct answer with most names I tried (for example “Teddy Riner"@en) but it fails with Usain Bolt and Rachid Badouri.

I don’t get why as their DBpedia pages (Teddy Riner, Usain Bolt) are constructed the same way: they both have a rdfs:label, which is written exactly like I did.

It seems to me that there is an incoherence between the endpoint and DBpedia. But I don’t think that it's because the endpoint is not to date.

Even more surprising, this query gives the correct answer:

SELECT *
WHERE {
?x rdfs:label "Usain Bolt"@en .
}

However, Usain Bolt is a dbo:Person! Same thing for Rachid Badouri.

Could someone explain me why the first query does not give answer?

Any help would be appreciated! Thanks

回答1:

According to DBpedia-Live, at the time of writing, the entity with rdfs:label "Usain Bolt"@en has many types, but is not a dbo:Person. Similar for the entity with rdfs:label "Rachid Badouri"@en.

In contrast, the entity with rdfs:label "Teddy Riner"@en is a dbo:Person.

Note: DBpedia-Live content is a moving target, varying with Wikipedia content changes, adjustments in the templates, and other variables. The statements I made above may no longer be true when you read this.

来源：https://stackoverflow.com/questions/48345125/querying-dbpedia-live-with-sparql-does-not-give-same-answer-as-dbpedia