Complex sentence: After leaving the Clinton Administration, Mills took a break from the practice of law; from 1999--2001, she served as Senior Vice President for Corporate Policy and Public Programming at Oprah Winfrey's Oxygen Media.
Split into simpler sentences: After leaving the Clinton administration, Mills took a break from the practice of law. From 1999 to 2001, she served as Senior Vice President for Corporate Policy and Public Programming at Oprah Winfrey's Oxygen Media.