The one number the two queries below do not show between them. Every pair of the 41 datings stands in exactly one relation on the modelled interval, so the first row is all 820 pairs. The second counts only those whose relation is unchanged when the intervals are widened to the full span of their potters' date ranges. Just under half. That ratio is the uncertainty of the relative chronology, expressed as a count rather than as a caveat — and it is the reason time:interval* carries the smaller set.
?pairs by ?reading
Also available as a plain file:
allen-strength.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.