Complex sentence: The Kladruber is the oldest czech horse breed, bred in Kladruby nad Labem national stud, and although it is approching 400 years old, it is remarkably rare (90 mares as of 1995).
Split into simpler sentences: The Kladruber is the oldest czech horse breed, and today is considered very rare. Bred in Kladruby nad Labem national stud, the Kladruber breed is almost 400 years old, yet is remarkably rare (90 mares as of 1995).