query: SELECT DISTINCT ?mettag ?itemLabel ?item 
  WHERE 
  {
    ?item p:P1343 [
      ps:P1343 wd:Q106727050 ;  
               pq:P1810 ?mettag ] .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  } ORDER BY ?mettag