Complex sentence: The anthology "The Mersey Sound" was published by Penguin in 1967, containing the poems of Henri, McGough and Patten, and has remained in print ever since, selling in excess of 500,000 copies.
Split into simpler sentences: The anthology "The Mersey Sound" was published by Penguin in 1967, containing the poems of Henri, McGough and Patten. This has remained in print ever since, selling in excess of 500,000 copies.