Task: Explanation
Input (English): Pantera was an American heavy metal band from Arlington, Texas. The group was formed in 1981 by the Abbott brothers – drummer Vinnie Paul and guitarist Dimebag Darrell – along with lead vocalist Terry Glaze. Bassist Rex Brown joined the band the following year, replacing Tommy D. Bradford, who was the unofficial original. Having started as a glam metal band, Pantera released four albums during the 1980s. Looking for a new and heavier sound, Pantera replaced Glaze with Phil Anselmo in late 1986 and released "Power Metal" in 1988. With its fifth album, 1990's "Cowboys from Hell", Pantera introduced a groove metal sound. Pantera's sixth album, 1992's "Vulgar Display of Power", exhibited an even heavier sound. "Far Beyond Driven" (1994) debuted at number one on the "Billboard" 200. Question: This former member of Down was also a member of a group that started as what kind of band? Answer: a glam metal band
Output (English):  Having started as a glam metal band, Pantera released four albums during the 1980s.