query: SELECT ?type (COUNT(?item) AS ?count) WHERE {
    ?item p:P1343/ps:P1343 wd:Q66362718 .
    BIND(xsd:integer(STRAFTER(STR(?item), 'Q')) AS ?qid )
    OPTIONAL { #Oldies 
      FILTER(?qid < 66363195) .
      BIND("Existing items created before August 2019" AS ?type) }
    OPTIONAL {
      FILTER(?qid >= 66363195) .
      BIND("New items created August 2019 or newer" AS ?type) 
    }
  } GROUP BY ?type 
  