Complex sentence: Perkins Coie is an international law firm headquartered in Seattle, Washington and is the oldest and largest law firm headquartered in the Pacific Northwest and has a total of 19 offices across the United States and Asia.
Split into simpler sentences: Perkins Coie is an international law firm headquartered in Seattle, Washington. It is the oldest and largest law firm headquartered in the Pacific Northwest and has a total of 19 offices across the United States and Asia.