The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
AP-HP's announcement says "les travaux du campus hospitalo-universitaire Saint-Ouen Grand Paris-Nord ont debute le 30 mars 2026" - the works began on 30 March 2026.
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.