Complex sentence: In 1967, it is understood that Jack Good put together a band of musicians under the name of Sgt Peppers Lonely Hearts Club Band as a promotion for The Beatles album of the same name.
Split into simpler sentences: In 1967, It is understood that Jack Good put together, a band of musicians under the name of Sgt Peppers Lonely Hearts Club Band. As a promotion for The Beatles album of the same name.