Complex sentence: He then served as Minister Plenipotentiary in Mexico until 1913, and from 1913 to 1919 he served as Envoy Extraordinary and Minister Plenipotentiary at Santiago, Chile.
Split into simpler sentences: He then served as Minister Plenipotentiary in Mexico until 1913. From 1913 to 1919 he served as Envoy Extraordinary and Minister Plenipotentiary at Santiago, Chile.