Complex sentence: New York's Adirondack Park is the largest state park in the United States and is larger than the Yellowstone, Yosemite, Grand Canyon, Glacier, and Olympic National Parks combined.
Split into simpler sentences: New York's Adirondack Park is the largest state park in the United States. It is larger than the Yellowstone, Yosemite, Grand Canyon, Glacier, and Olympic National Parks combined.