Complex sentence: He served as President of the Congress of Deputies (the equivalent to the Anglo-Saxon office of parliamentary Speaker) from 1906 to 1907, and became Prime Minister and chief of the Liberal party in 1910.
Split into simpler sentences: He served as President of the Congress of Deputies (the equivalent to the Anglo-Saxon office of parliamentary Speaker) from 1906 to 1907. Canalejas became Prime Minister and chief of the Liberal party in 1910.