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 B1M’s article (published 10 January 2018) already described the building as recently opened, and independent design press dated the official opening precisely. Happened as dated, per the source: "officially opened on 24 October 2017, with an event hosted by founder Michael R. Bloomberg".
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.