Complex sentence: She is a former contributing editor to "Maclean's", and was a columnist with the "National Post" from 1998 to 2002 and again from 2006 to 2007.
Split into simpler sentences: She is a former contributing editor to "Maclean's". She was a columnist with the "National Post" from 1998 to 2002 and again from 2006 to 2007.