Complex sentence: Note however that all editions of the book are labelled "First Edition" even though the book has been through at least four versions.By the fourth version (23rd printing) most errors had finally been corrected.
Split into simpler sentences: Note however that all editions of the book are labelled "First Edition" even though the book has been through at least four versions. As of the fourth version (23rd printing) most errors have finally been corrected.