query: embed.html#SELECT ?item ?birth ?birthprecision WHERE {
    ?item p:P570 ?birthclaim .
    ?birthclaim pq:P31 wd:Q26961029 .
    ?birthclaim psv:P570 ?birthvalue .
    ?birthvalue wikibase:timeValue ?birth .
    ?birthvalue wikibase:timePrecision ?birthprecision .
    FILTER(?birthprecision <=9 && year(?birth) < 1580 )
  } 