Complex sentence: One infamous story was when Prince gave them a scratch demo of a song that became "Kiss", which Brownmark along with frequent Prince collaborator and producer David Z. and Mazarati worked on and revamped into the version that became famous.
Split into simpler sentences: One infamous story was when Prince gave them a scratch demo of a song that became "Kiss". Brownmark, along with frequent Prince collaborator and producer David Z. including Mazarati, revamped the number into the version that became famous.