What is Janet Yellen?
{{Infobox officeholder | name = Janet Yellen | image = Secretary Janet Yellen portrait.jpg | caption = Official portrait, 2021 | office = 78th [[United States Secretary of the Treasury]] | president = [[Joe Biden]] | deputy = [[Wally Adeyemo]] | term_start = January 26, 2021 | term_end = January 20, 2025 | predecessor = [[Steven Mnuchin]] | successor = [[Scott Bessent]] | office1 = 15th [[Chair of the Federal Reserve]] | president1 = [[Barack Obama]]<br/>[[Donald Trump]] | deputy1 = [[Stanley Fischer]] | term_start1 = February 3, 2014 | term_end1 = February 3, 2018 | predecessor1 = [[Ben Bernanke]] | successor1 = [[Jerome Powell]] | office2 = 19th [[Vice Chair of the Federal Reserve]] | president2 = Barack Obama | term_start2 = October 4, 2010 | term_end2 = February 3, 2014 | predecessor2 = [[Donald Kohn]] | successor2 = Stanley Fischer | office3 = Member of the [[Federal Reserve Board of Governors]] | president3 = Barack Obama<br/>Donald Trump | term_start3 = October 4, 2010 | term_end3 = February 3, 2018 | predecessor3 = [[Mark W. Olson]] | successor3 = [[Lisa D. Cook]] | president4 = [[Bill Clinton]] | term_start4 = August 12, 1994 | term_end4 = February 17, 1997 | predecessor4 = [[Wayne Angell]] | successor4 = [[Edward Gramlich]] | office5 = 11th [[Federal Reserve Bank of San Francisco#Governors and presidents|President of the Federal Reserve Bank of San Francisco]] | term_start5 = June 14, 2004 | term_end5 = October 4, 2010 | predecessor5 = Robert T. Parry | successor5 = [[John C. Williams (economist)|John C. Williams]] | office6 = 18th [[Council of Economic Advisers#Chairs|Chair of the Council of Economic Advisers]] | pr