sentences:  During the early 1990s, the plaza was better known as EMB, one of the world's premier street skateboarding sites.Formal athletic ceremonies and rallies have also occurred in the plaza, including the retirement of Joe Montana (1995), attended by an estimated 25,000 people; the commemoration of Barry Bonds becoming the all-time home run leader (2007); and as the site of Super Bowl City, a "fan village" for attendees of Super Bowl 50 (2016) at Levi's Stadium in distant Santa Clara.Because of its size, the plaza is also frequently used for political rallies, including the Occupy San Francisco protest which took over the plaza for several months in 2011.