Bregenz contributes four separately dated findspots; Colchester, London, Vindonissa and La Graufesenque two each. This is why the dating hangs on the findspot rather than on the site, and why the URI fragment is a hash of the findspot name taken per site: a site identifier alone could not tell the four Bregenz contexts apart, and they are dated differently.
Also available as a plain file:
findspots-per-site.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.