Complex sentence: The Hartford is the 12th-largest property and casualty company in the United States, sells its products primarily through a network of agents and brokers, and has been the direct auto and home insurance writer for members of AARP for more than 25 years.
Split into simpler sentences: The Hartford is the 12th-largest property and casualty company in the United States. They sell products primarily through a network of agents and brokers, and have also been the auto and home insurance writer for AARP members for more than 25 years.