Complex sentence: Sarah Hall Ingram was the commissioner of the IRS department responsible for tax-exempt organizations between 2009 and 2012 She was Lois Lerner's direct supervisor and is now the director of the IRS Affordable Care Act office.
Split into simpler sentences: Sarah Hall Ingram was the commissioner of the IRS department responsible for tax-exempt organizations between 2009 and 2012. She is now the director of the IRS Affordable Care Act office.