query: 
  
  SELECT ?item ?itemLabel ?start ?end ?point ?doLabel
  
  
  WHERE {
   
  
  ?item wdt:P1830 wd:Q24027085 . 
    
   
    ?item p:P1830 ?do .
    ?do pq:P580 ?start .
    ?do pq:P582 ?end .
                                 
    SERVICE wikibase:label {
      bd:serviceParam wikibase:language "en" .
    }
  }
  
  
  