rdf - LinkedMDB SPARQL results with fewer results than expected? -

rdf - LinkedMDB SPARQL results with fewer results than expected? -

slide 14 of ontology alignment discovery using linked open data says there 50,603 actors in linkedmdb dataset. using next query, 2500. wrong here?, there missing in query? why slides count such high number? sparql query:

select(count(distinct ?actors) ?nactors) { ?actors <http://data.linkedmdb.org/resource/movie/actor> . }

results

many public endpoints impose limits on queries in order ensure 1 badly behaved client not bring down/adversely impact performance other users of service.

the specific service talking appears have result limit of 2500 answers this discuss

some services may have execution time limits prevent queries running beyond amount of time.

you can work around limitation using limit , offset request pages of results. unfortunately appears won't help query because utilize aggregate , appears service applying limit prior aggregation. note if have other queries limit , offset approach work i.e. don't utilize aggregation may need add together order by depending on sparql service without may receive same results repeatedly

rdf sparql linked-data linkedmdb