Complex sentence: Abraham Alfonse Albert Gallatin (January 29,1761--August 12,1849) was a Swiss-American ethnologist, linguist, founder of New York University, politician, diplomat, congressman, Senator and the longest-serving United States Secretary of the Treasury.
Split into simpler sentences: Abraham Alfonse Albert Gallatin (January 29,1761--August 12,1849) was a Swiss-American politician, diplomat, ethnologist and linguist. He served as a Congressman, Senator, United States Ambassador and was the longest-serving United States Secretary of the Treasury.