Complex sentence: By this point, Assemblage 23 had become fairly popular within the EBM genre; the third album, "Defiance", was released in October 2002 on Metropolis and Accession, preceded by the single "Document", in September of that year.
Split into simpler sentences: By this point, the group had become fairly popular within the EBM genre; the third album, "Defiance", was released in October 2002 on Metropolis and Accession. The single from "Defiance", "Document", was released in September of that year.