query: PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
  
  SELECT DISTINCT ?item ?itemLabel ?lb_num WHERE {
    ?item wdt:P31 wd:Q811979.
    ?item wdt:P709 ?lb_num.
  
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
  
  }