Complex sentence: It has long been called the'Delta,' a verdant triangle of land at the heart of the Central Valley, stretching about 50 miles from Susuin Bay on the west to Stockton and Sacramento.
Split into simpler sentences: It has long been called the'Delta,' this verdant triangle of land at the heart of the Central Valley. It's about 50 miles, stretching from Susuin Bay on the west to Stockton and Sacramento.