Original sentence: The existence of some modern-day genres such as death metal and grindcore, which enjoy an extensive underground following, indicate that even the harshest sounds can be considered music if the listener is so inclined
Edited sentence: The existence of some modern-day genres such as death metal and grindcore, which enjoy an extensive underground following and is full of groupies such as punks, stoners and dead heads, indicate that even the harshest sounds can be considered music if the listener is so inclined