Complex sentence: The flag is commonly called "Bendera Merah-Putih" (Red-and-White Flag) and is, occasionally, also called "Sang Dwiwarna" (The bicolor).
Split into simpler sentences: The flag is commonly called "Bendera Merah-Putih" (Red-and-White Flag). Occasionally, it is also called "Sang Dwiwarna" (The bicolor).