The findspots whose interval begins before the year 1. Note that numericPosition and inXSDgYear differ by one: xsd:gYear counts astronomically, so 1 BC is the year 0, whereas the source database counts historically and the arithmetic must stay on an unbroken number line. Rather than silently picking one, the graph carries both and declares its own time reference system for the number line.
Also available as a plain file:
era-and-scale.rq.
The graph is fetched as a static file and queried in your browser with
rdflib under Pyodide — there is no endpoint, and nothing you type
leaves your machine.