This party is on the record at 2 sites. Each row is that site's own
reading of it. Role tallies count appearances in that site's record and are deliberately
not added together — one network-global reference source is read into every site's
graph, so a sum would report the same appearance once per watershed point.
Troy · Piqua (primary reading)
— water · receiving_water · receiving water ×2 · 2 sources
Sidney
— water · receiving_water · receiving water ×1 · 1 source