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 hexus.net: "Samsung[3] debuts 33ft wide HDR LED cinema display Tags: Samsung (00593…"
Engadget's July 14, 2017 article independently confirms Samsung's[3] 33.8-foot Cinema LED Screen unveiling, matching the pin's stored date and title exactly.
The page could not be fetched (403 Forbidden), but Samsung's own newsroom headline, "Samsung Debuts World's First Cinema LED Display," and its July 13, 2017 publish date directly match the pin's title and stored date, just one day ahead of it.
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. A picture that shows something else, or shows it badly, is looked at too, and moved down or replaced.