What happened with Adult Friend Finder's data breach on Yahoo?

It seems there might be a bit of confusion in the question. Adult Friend Finder, a dating and hookup site, suffered a significant data breach in 2016 where hackers compromised the personal information of millions of its users. This incident is separate and distinct from any breaches that affected Yahoo. However, referring to Yahoo may relate to the website's own history of data breaches—one in 2013, which affected all 3 billion accounts, and another in 2014 which impacted 500 million users. The Adult Friend Finder's and Yahoo's breaches were both among the larger cyber security incidents at the time and highlighted the growing concerns over personal data security online.