Complex sentence: In 1861 Chase accepted the newly-elected President Lincoln's offer to serve as his Treasury Secretary and he took up residence with 20-year-old Kate at 6th and E Street Northwest in Washington.
Split into simpler sentences: In 1861 Chase accepted the newly elected President Lincoln's offer to serve as his Treasury Secretary. He took up residence with 20-year-old Kate at 6th and E Street Northwest in Washington.