query: # Members of 117th United States Congress sorted by age
  SELECT ?item ?itemLabel ?positionLabel ?dob
  WHERE
  {
    ?item p:P39 ?statement .
    ?statement ps:P39 ?position .
    ?statement pq:P2937 wd:Q65089999 . # parliamentary term: 117th United States Congress
    OPTIONAL { ?item wdt:P569 ?dob . }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" . }
  }
  ORDER BY ASC(?dob)