This query works
SELECT DISTINCT ?id ?label ?description WHERE {
{
SELECT ?id WHERE { ?i wdt:P31 ?id. }
}
?id rdfs:label ?label.
?id schema:description ?description.
FILTER((LANG(?label)) = "en")
FILTER((LANG(?description)) = "en")
}
LIMIT 20but this query times out
SELECT DISTINCT ?id ?label ?description WHERE {
?i wdt:P31 ?id.
?id rdfs:label ?label.
?id schema:description ?description.
FILTER((LANG(?label)) = "en")
FILTER((LANG(?description)) = "en")
}
LIMIT 20So as far as I understand those two queries are semantically the same and it might be a bug that a sub query must be used to avoid time outs.