the group's second album, "déjà vu", remains the group's most successful album, selling more than eight million copies. all of the group members were songwriters with some of their biggest hits—"", "teach your children", and "ohio"—being written by stephen stills, graham nash, and young respectively. the group has also recorded songs by other writers, such as the hit single "woodstock" written by joni mitchell. all members pursued careers independent of the group, and as solo artists david crosby and nash have each earned one gold record, stills has three, the pair of crosby and nash also three, and a one-time pair of stills and young has one. the trio configuration has sold around 13 million albums, while the quartet has sold around 20 million. combined sales of the group including solo, duo, trio and quartet versions is over 70 million.