Matthias Winkelmann

Queries =

Find references with quotes, list with statement value, source, etc.

SELECT distinct ?item ?itemLabel ?valueLabel ?statementLabel ?quote ?url ?publishedLabel ?published
WHERE 
{
  ?ref  pr:P1683 ?quote.
OPTIONAL {  ?ref pr:P1433|pr:P248 ?published. }
  
OPTIONAL {  ?ref pr:P854 ?url. }
 # ?item ?stament ?value. 
  ?item ?property [
    ?prop ?value;
    prov:wasDerivedFrom ?ref
    ].
  ?item wdt:P31 wd:Q5.
       ?item ?pro ?value.
  # ?item wdt:P1142|wdt:P1387|wdt:P21 ?value.
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}  LIMIT 10000

Try it!