Complex sentence: September 1968 saw release of the Crazy World of Arthur Brown's eponymous first album, produced by Kit Lambert, which featured a side-long mini-opera reflecting on the horrors of Hell.
Split into simpler sentences: September 1968 saw release of the Crazy World of Arthur Brown's eponymous first album. Produced by Kit Lambert, the album featured a side-long mini-opera reflecting on the horrors of Hell.