Regex Match Comma Outside Quotes & Sayings

I finish the book so I can see how it's going to end. I write that first sentence, and if it's the right first sentence, it leads to the right second sentence and three years later you have a 500-page manuscript, but it really is like going on a trip, going on a journey. It's a voyage. — Tom Robbins

Getting older doesn't help you in the fact that you might have covered some of this ground before. So you're listening to a song that you know is a hit, but it just can't be a hit for you, it's gonna be a hit for somebody else. That's tough. — Garth Brooks

Never let your dreams keep your eyes close to long. Wake up and make them a reality. — Stephen D. Matthews

He might die, but at least he could fight first, and not simply pass his days shaking at the expectation of slaughter. — Larry McMurtry

Why is it that Serge Lange's Linear Algebra, published by no less a Verlag than Springer, ostentatiously displays the sale of a few thousand copies over a period of fifteen years, while the same title by Seymour Lipschutz in the The Schaum's Outlines will be considered a failure unless it brings in a steady annual income from the sale of a few hundred thousand copies in twenty-six languages? — Gian-Carlo Rota