Complex sentence: In addition to his work on the plantations, which continued for decades, he taught in various towns in Louisiana and the neighboring state of Mississippi and at his home in New Orleans, organizing several bands in the city such as The Onward Band and the Pickwick.
Split into simpler sentences: In addition to his work on the plantations, which continued for decades, he taught in various towns in Louisiana and the neighboring state of Mississippi. At his home in New Orleans he organized several prominent bands such as The Onward Band and the Pickwick.