Original sentence: He continued to use the title of Crown Prince during his exile until April of 1989 when he finally assumed the title of Emperor with the reign name of Amha Selassie I.In December 1960, the Imperial Guard launched a coup d'etat and seized power in Ethiopia while the Emperor was on a visit to Brazil.The revolutionaries soon showed their true colors and abolished the monarchy in March of 1975, and Crown Prince Asfaw Wossen settled permanently in London, where several other members of the Imperial family were already based
Edited sentence: He continued to use the title of Crown Prince during his exile until April 1989 when he finally assumed the title of Emperor with the reign name of Amha Selassie I.In December 1960, the Imperial Guard launched a coup d'état and seized power in Ethiopia while the Emperor was on a visit to Brazil.The revolutionaries soon showed their true colors and abolished the monarchy in March 1975, and Crown Prince Asfaw Wossen settled permanently in London, where several other members of the Imperial family were already based