query: SELECT
    (wd:Q2481549 as ?item) 
    ("area" as ?type)
    ("400" as ?height) 
    ("300" as ?width) 
    ("age" as ?xAxisTitle) 
    ("people" as ?yAxisTitle)
    (GROUP_CONCAT(?age;separator=",") as ?x)
    (GROUP_CONCAT(?count;separator=",") as ?y)
  WHERE
  {
    { SELECT ?age (COUNT(DISTINCT ?item) as ?count)
    {
      ?item wdt:P1343 wd:Q95431705.
      ?item p:P569 / psv:P569 [ wikibase:timeValue ?dob ; wikibase:timePrecision ?prec1 ] .
      ?item p:P570 / psv:P570 [ wikibase:timeValue ?dod ; wikibase:timePrecision ?prec2 ] .
      FILTER( ?prec1 >8 && ?prec2 >8 && ?dob < ?dod )                  
      BIND( YEAR(?dod)-YEAR(?dob) as ?age)
      ?item wdt:P31 wd:Q5 .
    }
    GROUP BY ?age
    ORDER BY DESC(?age)
    }
  }