title: Rock Band (video game)
context: Rock Band is a music video game developed by Harmonix, published by MTV Games and distributed by Electronic Arts. It is the first title in the Rock Band series. The Xbox 360 and PlayStation 3 versions were released in North America on November 20, 2007,[2] while the PlayStation 2 version was released on December 18, 2007[6] and the Wii version on June 22, 2008. Harmonix previously developed the first two games in the Guitar Hero series, which popularized gameplay of rock music with guitar-shaped controllers. After development of the series was shifted to Neversoft, Harmonix conceived Rock Band as a new title that would offer multi-instrument gameplay.
question: When was the video game Rock Band first introduced?
answers: November 20, 2007