Complex sentence: With the revival of interest in ragtime in the 1950s Lamb shared his memories of Joplin and other early ragtime figures with music historians, composed some new rags and brought out some of his old compositions that had never been published, and made some recordings.
Split into simpler sentences: With the revival of interest in ragtime in the 1950s, Lamb shared his memories of Joplin and other early ragtime figures with music historians. He also composed some new rags, brought out some of his old compositions that had never been published, and made some recordings.