SELECT ?item ?itemLabel ?itemDescription ?wdprop ?wdpropLabel ?pso ?psoLabel ?wdpq ?wdpqLabel ?pqo ?pqoLabel
WHERE {
  VALUES ?item {wd:Q19957642} # Example is for Ruby Duncan. Works for any wikidata item.

  # 1) return all 1st-order nodes & literals for the item
  ?item ?p ?statement .

  # 2) get all predicate/object values (sub-nodes & literals) for all
  # 1st order nodes pointing inside and outside of wikidata graph
  ?statement ?psp ?pso .

  # 3) use :claim to return only statements in wikibase/data model
  ?wdprop wikibase:claim ?p .

  # 4) use :statementProperty to get only
  # props in the ps namespace
  ?wdprop wikibase:statementProperty ?psp .

  # 5) use :qualifier to add pq namespace for any existing qualifiers.
  OPTIONAL { ?statement ?pqp ?pqo . ?wdpq wikibase:qualifier ?pqp . }

  SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
} ORDER BY ?wdpropLabel