query: SELECT ?edition ?editionLabel ?gutenbergid ?gpubdate ?book ?bpubdate ?guten2 WHERE {
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
    ?edition wdt:P31 wd:Q3331189.
    ?edition wdt:P2034 ?gutenbergid.
    ?edition wdt:P629 ?book.
    OPTIONAL { ?book wdt:P2034 ?guten2. }
      OPTIONAL { ?edition wdt:P577 ?gpubdate. }
    OPTIONAL { ?book wdt:P577 ?bpubdate. }
  
  }
  ORDER BY ?book
  LIMIT 100