Complex sentence: The 1980's saw the Cookhouse, Twin/Tone and the beginning of the Creation era, the birth of the R&B influenced "Minneapolis sound", and the emergence of the Alternative rock scene.
Split into simpler sentences: The 1980's saw the Cookhouse, Twin/Tone and Creation era. This time period also saw the birth of the R&B influenced "Minneapolis sound", and the emergence of the Alternative rock scene.