Question: Who is the {data controller (GDPR)} for {secretary general} of {Mariano Rajoy}
Paraphrase: Who is the {information controller (GDPR)} for {secretary common} of {Mariano Rajoy}
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P3975 wd:Q10819 . ?sbj wdt:P31 wd:Q59859818 }