Task: Explanation
Input (English): 311 (pronounced "three-eleven") is an American rock band from Omaha, Nebraska. The band was formed in 1988 by vocalist and guitarist Nick Hexum, lead guitarist Jim Watson (a member briefly, before being replaced by Tim Mahoney in 1991), bassist Aaron "P-Nut" Wills. and drummer Chad Sexton. In 1992, Doug "SA" Martinez joined to sing and provide turntables for 311's later albums, rounding out the current line-up. The band's name originates from the police code for indecent exposure in Omaha, Nebraska, after the original guitarist for the band was arrested for streaking. Question: Which band had more members in its original line-up, 311 or Mercury Rev? Answer: Mercury Rev
Output (English):  The band was formed in 1988 by vocalist and guitarist Nick Hexum, lead guitarist Jim Watson a member briefly, before being replaced by Tim Mahoney in 1991, bassist Aaron PNut Wills.