Complex sentence: It is important to note, the Giant Schnauzer and Miniature Schnauzer were bred from the Standard Schnauzer, making the Standard Schnauzer the original and oldest of this breed of dog.
Split into simpler sentences: It is important to note, the Giant Schnauzer and Miniature Schnauzer were breed from the Standard Schnauzer. Making the Standard Schnauzer the original and oldest of this breed of dog.