Complex sentence: In the 1980s, Bredon was made aware of Led Zeppelin's version of the song; since 1990 the Led Zeppelin version has been credited to Anne Bredon/Jimmy Page & Robert Plant, and Bredon received a substantial back-payment in royalties.
Split into simpler sentences: In the 1980s, Bredon was made aware of Led Zeppelin's version of the song. Since 1990 the Led Zeppelin version has been credited to Anne Bredon/Jimmy Page & Robert Plant, and Bredon received a substantial back-payment in royalties.