query: #Cancer deaths per year and cancer type
  
  #defaultView:AreaChart
  SELECT ?cid (str(SAMPLE(?year_)) AS ?year )  (COUNT(*) AS ?count)  ?cause WHERE {
    ?pid wdt:P31 wd:Q5.
    ?pid wdt:P509 ?cid.
    ?cid wdt:P279* wd:Q12078.
    
    OPTIONAL {
      ?cid rdfs:label ?cause.
      FILTER((LANG(?cause)) = "en")
    }
     ?pid wdt:P570 ?_date_of_death. 
    BIND ( YEAR(?_date_of_death) AS ?year_ )
    FILTER( BOUND(?cause)  )
    FILTER( BOUND(?year_)  )
    FILTER( ?year_ > 1960 )
  }
  GROUP BY ?cid ?cause ?year_