'How to iterate a query over the whole db in SPARQL?

i'm not new to SQL, but new to SPARQL and i need to pull some information from the ULAN database (https://www.getty.edu/research/tools/vocabularies/ulan/)

The infos that i need are correctly pulled for 1 author (id: 500115493) using this query that i've found on the FAQ section:

select * {
ulan:500115493 ?rel ?x.

?rel sesame:directSubPropertyOf skos:related.

?x gvp:prefLabelGVP/xl:literalForm ?name.

?x foaf:focus/gvp:biographyPreferred/schema:description ?bio.

optional {[

rdf:subject ulan:500115493;

rdf:predicate ?rel;

rdf:object ?x;

rdfs:comment ?comment]}}

Those are the relationship infos about A. Dürer.

Now, i need to generalize the query and make it work for all the authors on the db in such a way that the output has this kind of structure:

{'name_of_the_author': [data]}

where "data" are the informations pulled by the example query, does not matter how formatted.

How can i structure such a query?

Thanks in advance, Alessandro

sparql

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'How to iterate a query over the whole db in SPARQL?

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