What is the person who Claude Mongeau succeeded the CEO of?
CSX
Title: Financial Supervisory Authority (Iceland)
Passage: The Financial Supervisory Authority (Icelandic: "Fjármálaeftirlitið (FME)" ) is the single supervisory authority for the financial sector in Iceland.  Companies regulated by the authority are commercial banks, savings banks, insurance companies, insurance brokers, credit institutions (investment banks and credit card companies), securities firms, securities brokers, mutual funds and pension funds management companies and other entities authorized to receive deposits.  The current CEO is Ms. Unnur Gunnarsdóttir, who succeeded the controversial Gunnar T. Andersen in March 2012.  Deputy CEO Ragnar Haflidason succeeded Jónas Fr Jónsson in October 2008 and Gunnar T Andersen took over as CEO in April 2009.  The first CEO was Pall Gunnar Palsson, who directed from 1999 to 2005.
Title: E. Hunter Harrison
Passage: Ewing Hunter Harrison (born November 7, 1944) is a railway executive who served as the CEO of Illinois Central Railroad (IC), Canadian National Railway (CN) and Canadian Pacific Railway (CPR), and now serves as CEO of CSX.
Title: Claude Mongeau
Passage: Claude Mongeau is a Canadian railroad executive who served as the President and Chief Executive Officer of Canadian National Railway (CNR) from January 1, 2010 to July 1, 2016.  He succeeded Hunter Harrison.  During his tenure as President of CN, he ""tried to improve ... frayed relations with the railway’s customers and partners through a series of service agreements.""
Claude Mongeau E. Hunter Harrison