Complex sentence: On December 22,2013, IAC fired their Director of Corporate Communications, Justine Sacco, became she became a source of controversy for tweeting an AIDS joke that was widely taken to be racist but may have been sarcastic.
Split into simpler sentences: On December 22,2013, IAC fired their Director of Corporate Communications, Justine Sacco. She became a source of controversy for tweeting an AIDS joke that was widely taken to be racist but may have been sarcastic.