Graph visualization

"1949"^^xsd:gYearPage 1  (more)schema:startDateschema:startDateschema:endDateschema:startDateschema:startDateschema:endDateschema:endDateschema:endDateschema:endDateschema:startDateschema:startDateschema:endDateschema:endDateschema:endDateschema:endDateschema:startDateschema:endDateschema:startDateschema:endDateschema:startDate