Complex sentence: Also, he completed the tune "Mi Amigo Cubano" co-written with Bill Withers that was germinated in the film "Still Bill", which was premiered in August 2014 online with USA Today.
Split into simpler sentences: Also, he completed the tune started in the film "Still Bill" a co-write with Bill Withers. That tune "Mi Amigo Cubano" was premiered in August 2014 online with USA Today.