Hello everyone, I was wondering about the example query "Average number of children per year". When I try to parse this using OpenRDF, I get the error "projection alias 'year' was previously used", in Jena "Variable used when already in-scope: ?year in ((str ?year) AS ?year)". This seems to be in line with the sparql specifications.
However, query.wikidata.org accepts it just fine. So I was wondering how exactly this kind of situation is being resolved. Greetings, Adrian
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