Original sentence: Marcos is the eldest daughter of dictator Ferdinand Edralin Marcos, former president of the Philippines (1965 - 1986), and former First Lady Imelda Romualdez-Marcos, both parents ruling the Philippines together for twenty years
Edited sentence: Marcos is the eldest daughter of  Ferdinand Edralin Marcos, former president of the Philippines (1965 - 1986), and former First Lady Imelda Romualdez-Marcos, both parents ruling the Philippines together for twenty years