query: SELECT ?item (REPLACE(?cattitle, "Category:", "") as ?c)
  {
  	?item wdt:P971 wd:Q4663261 . 
    	?item wdt:P971 wd:Q5 . 
      [] schema:about ?item ; schema:isPartOf <https://en.wikipedia.org/>; schema:name ?cattitle .     
  }
  Limit 250