Complex sentence: Lee and Lifeson both acknowledged that during the writing and recording sessions for the band's debut album Rutsey was given the role of chief lyricist; however, when the time came to start recording, he did not deliver any lyrics.
Split into simpler sentences: Lee and Lifeson have each acknowledged that during the writing and recording sessions for the band's debut album, Rutsey was given the role of chief lyricist. However, when the time came to start recording, he did not deliver any lyrics.