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PREFIX dbo: <http://dbpedia.org/ontology/>
SELECT ( COUNT (DISTINCT ?abs) AS ?cnt ) WHERE {
?event a dbo:Event;
dbo:abstract ?abs.
FILTER ( LANGMATCHES ( LANG(?abs) , 'fr' ) )
}
SELECT ?author (COUNT( DISTINCT ?link ) as ?nb) WHERE {
?link a dbo:Writer.
?author a dbo:Writer;
dbo:wikiPageWikiLink ?link.
} GROUP BY ?author ORDER BY DESC(?nb)