Complex sentence: Estrada died three months later, on 21 December 1911, and Zaldumbide again served as acting president until 6 March 1912 when he was succeeded by Francisco Andrade Marín.
Split into simpler sentences: Estrada died three months later, on 21 December 1911, and Zaldumbide again served as acting president. On 6 March 1912, he was succeeded by Francisco Andrade Marín.