query: SELECT ?Wikidata ?Mendeley_person_ID ?Label WHERE {
    SERVICE wikibase:label {
      bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en".
      ?Wikidata wdt:P3835 ?Mendeley_person_ID.
      ?item wdt:P3835 ?Mendeley_person_ID.
    }
    OPTIONAL { ?Wikidata wdt:P3835 ?Mendeley_person_ID. }
    OPTIONAL { ?Wikidata wdt:P31 ?Label. }
  }
  ORDER BY ?Label