Complex sentence: Allin described himself as "the last true rock and roller": by this, he meant that rock and roll music itself had started as an embodiment of danger, anti-authoritarianism and rebelliousness but had become largely taken over by corporations and business concerns.
Split into simpler sentences: Allin described himself as "the last true rock and roller". By this, he meant that rock and roll music itself had started as an embodiment of danger, anti-authoritarianism and rebelliousness but had become largely taken over by corporations and business concerns.