Complex sentence: In 1891, Hughes left the practice of law to become a professor at Cornell Law School, but in 1893, he returned to his old law firm in New York City to continue practicing until he ran for governor in 1906.
Split into simpler sentences: In 1891, Hughes left the practice of law to become a professor at Cornell Law School. In 1893, he returned to his old law firm in New York City to continue practicing until he ran for governor in 1906.