Complex sentence: Bosch accurately perceived the process that had begun from those events, and wrote a letter to Trujillo, on February 27,1961, telling him that his political role, in historical terms, had concluded in the Dominican Republic.
Split into simpler sentences: Bosch accurately perceived the process that had begun from those events, and wrote a letter to Trujillo, dated February 27,1961. He told Trujillo that his political role, in historical terms, had concluded in the Dominican Republic.