Given the task definition and input, reply with output. In this task you are given data in the tabular format and a question. Write the answer to the question based on the information in the table.

Table: ['No.', 'Name', 'Took Office', 'Left Office', 'President served under', 'Notable for']. ['1', 'Harvey Washington Wiley, M.D.', 'January 1, 1907', 'March 15, 1912', 'Theodore Roosevelt, William Howard Taft', 'Chemist; advocacy of the passage of the Pure Food and Drug Act in 1906; subsequent work at Good Housekeeping Institute laboratories']. ['2', 'Carl L. Alsberg M.D.', 'December 16, 1912', 'July 15, 1921', 'William Howard Taft, Woodrow Wilson, Warren G. Harding', '']. ['3', 'Walter Gilbert Campbell', '7/16/1921', '6/30/1924', 'Warren G. Harding, Calvin Coolidge', '']. ['4', 'Charles Albert Browne, Jr.', '7/1/1924', '6/30/1927', 'Calvin Coolidge', '']. ['3', 'Walter Gilbert Campbell', '7/1/1927', '4/30/1944', 'Calvin Coolidge, Herbert Hoover, Franklin D. Roosevelt', '']. ['5', 'Paul B. Dunbar, Ph.D.', '5/6/1944', '5/31/1951', 'Franklin D. Roosevelt, Harry S Truman', '']. ['6', 'Charles W. Crawford', '6/1/1951', '7/31/1954', 'Harry S Truman, Dwight D. Eisenhower', '']. ['7', 'George P. Larrick', '8/12/1954', '12/27/1965', 'Dwight D. Eisenhower, John F. Kennedy, Lyndon B. Johnson', '']. ['8', 'James Lee Goddard, M.D.', '1/17/1966', '7/1/1968', 'Lyndon B. Johnson', '']. ['9', 'Herbert Leonard Ley, Jr., M.D.', '7/1/1968', '12/12/1969', 'Lyndon B. Johnson, Richard M. Nixon', '']. ['10', 'Charles C. Edwards, M.D.', '12/13/1969', '3/15/1973', 'Richard M. Nixon', '']. ['11', 'Alexander Mackay Schmidt, M.D.', '7/20/1973', '11/30/1976', 'Richard M. Nixon, Gerald R. Ford', '']. ['12', 'Donald Kennedy, Ph.D.', '4/4/1977', '6/30/1979', 'Jimmy Carter', '']. ['13', 'Jere Edwin Goyan, Ph.D.', '10/21/1979', '1/20/1981', 'Jimmy Carter', '']. ['14', 'Arthur Hull Hayes Jr., M.D.', '4/13/1981', '9/11/1983', 'Ronald Reagan', '']. ['15', 'Frank Edward Young, M.D., Ph.D.', '7/15/1984', '12/17/1989', 'Ronald Reagan', '']. ['16', 'David Aaron Kessler, M.D.', '11/8/1990', '2/28/1997', 'George H. W. Bush Bill Clinton', '']. ['17', 'Jane Ellen Henney, M.D.', '1/17/99', '1/19/2001', 'Bill Clinton', '']. ['18', 'Mark Barr McClellan, M.D., Ph.D', '11/14/2002', '3/26/2004', 'George W. Bush', '']. ['19', 'Lester Mills Crawford, D.V.M., Ph.D.', '7/18/2005', '9/23/2005', 'George W. Bush', 'Charged with conflict of interest and lying about stock he and his wife owned in companies regulated by FDA.']. ['20', 'Andrew C. von Eschenbach, M.D.', '12/13/2006', '1/20/2009', 'George W. Bush', 'Member of the board of directors of BioTime (NYSE MKT: BTX), a biotechnology and regenerative medicine company.']. ['21', 'Margaret A. Hamburg, M.D.', '5/22/2009', 'present', 'Barack Obama', '']. Question: which officials were in office two years for the most?

['Herbert Leonard Ley, Jr., M.D.', 'Jere Edwin Goyan, Ph.D.', 'Mark Barr McClellan, M.D., Ph.D', 'Lester Mills Crawford, D.V.M., Ph.D.']