Complex sentence: Cave is the subject and co-writer of the semi-fictional "day in the life" documentary "20,000 Days on Earth" (2014), and was again the subject in the documentary film "One More Time with Feeling" (2016).
Split into simpler sentences: Cave is the subject and co-writer of the semi-fictional "day in the life" documentary "20,000 Days on Earth" (2014). He was again the subject in the documentary film "One More Time with Feeling" (2016).