Complex sentence: Allegheny County is the center for health care and higher education employment, and higher education and health care were the biggest creators of high wage jobs in the Pittsburgh region between the six years of 1999 and 2005.
Split into simpler sentences: Allegheny County is the center for health care and higher education employment. JHigher education and health care were the biggest creators of high wage jobs in the Pittsburgh region between the six years of 1999 and 2005.