Complex sentence: Only those of Prince Muneyoshi and Nagachika survive in their entirety, but the surviving manuscripts of Nagachika's include some critical remarks by Prince Muneyoshi, and some of the manuscripts have been edited and only include the first book of the work.
Split into simpler sentences: Only those of Prince Muneyoshi and Nagachika survive in their entirety, but the surviving manuscripts of Nagachika's include some critical remarks by Prince Muneyoshi. Some of the manuscripts have been edited and only include the first book of the work.