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.
Happened as dated, per the source: "220 Central Park South was completed in 2019," with first residents moving in during 2018.
Wikipedia confirms "220 Central Park South was completed" in 2019, with "the first residents start[ing] moving into the building in late 2018," matching both the pin's stored 2019 completion date and its note about 2018 move-ins.
The Skyscraper Center's own database entry, dated 2019, lists 220 Central Park South's completion, consistent with the pin's stored 2019 date, though the page itself could not be fetched to quote directly.
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.