Complex sentence: The main guitar riff is accredited to Dave Grohl in the Nirvana Book of Tabs, however this may be inaccurate as Kurt Cobain commented during a 1992 post-concert interview that the song was written in 1987, before he'd met Dave Grohl.
Split into simpler sentences: The main guitar riff is accredited to Dave Grohl in the Nirvana Book of Tabs. However, the credit may be inaccurate as Kurt Cobain commented during a 1992 post-concert interview that the song was written in 1987, before he'd met Dave Grohl.