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.
The source gives the day: "The restaurant closed 30 July 2011 and relaunched as El Bulli Foundation, a center for culinary creativity." Adrià had confirmed in an October 2010 Vanity Fair article that it would close permanently after July 2011.
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.