Complex sentence: Safeco was founded in Seattle, Washington in 1923 by Hawthorne K. Dent as the General Insurance Company of America, a property and casualty insurer, a name which is still used by Safeco on some of its insurance products.
Split into simpler sentences: Safeco was founded in Seattle, Washington in 1923 by Hawthorne K. Dent as the General Insurance Company of America, a property and casualty insurer. This name is still used by Safeco on some of its insurance products.