What agency does Anderson Clayton Anderson work for? 
{'header': ['Number', 'Astronaut', 'Agency', 'Total EVAs', 'Total Time Hours:Minutes'], 'page_title': 'List of cumulative spacewalk records', 'section_title': 'List', 'caption': 'List', 'rows': [['1', 'Solovyev Anatoly Solovyev', 'RSA', '16', '82:22'], ['2', 'Lopez-Alegria Michael Lopez-Alegria', 'NASA', '10', '67:40'], ['3', 'Ross Jerry L. Ross', 'NASA', '9', '58:32'], ['4', 'Grunsfeld John M. Grunsfeld', 'NASA', '8', '58:30'], ['5', 'Yurchikhin Fyodor Yurchikhin', 'RSA', '8', '51:53'], ['6', 'Williams Sunita Williams', 'NASA', '7', '50:40'], ['7', 'Smith Steven L. Smith', 'NASA', '7', '49:48'], ['8', 'Fincke Michael Fincke', 'NASA', '9', '48:37'], ['9', 'Bowen Stephen G. Bowen', 'NASA', '7', '47:18'], ['10', 'Parazynski Scott E. Parazynski', 'NASA', '7', '47:05'], ['11', 'Tanner Joseph R. Tanner', 'NASA', '7', '46:29'], ['12', 'Curbeam Robert L. Curbeam', 'NASA', '7', '45:34'], ['13', 'Budarin Nikolai Budarin', 'RSA', '8', '44:25'], ['14', 'Wheelock Douglas H. Wheelock', 'NASA', '6', '43:30'], ['15', 'Newman James H. Newman', 'NASA', '6', '43:13'], ['16', 'Onufrienko Yuri Onufrienko', 'RSA', '8', '42:33'], ['17', 'Linnehan Richard Linnehan', 'NASA', '6', '42:23'], ['18', 'Feustel Andrew J. Feustel', 'NASA', '6', '42:18'], ['19', 'Fossun Michael Fossum', 'NASA', '6', '42:01'], ['20', 'Wolf David Wolf', 'NASA', '7', '41:17'], ['21', 'Musabeyev Talgat Musabayev', 'RSA', '7', '41:13'], ['22', 'Sellers Piers Sellers', 'NASA', '6', '41:10'], ['23', 'Krikalev Sergei Krikalev', 'RSA', '8', '41:08'], ['24', 'Avdeyev Sergei Avdeyev', 'RSA', '8', '41:00'], ['25', 'Whitson Peggy Whitson', 'NASA', '6', '39:46'], ['26', 'Tani Daniel M. Tani', 'NASA', '6', '39:11'], ['27', 'Mastracchio Richard Mastracchio', 'NASA', '6', '38:30'], ['28', 'Anderson Clayton Anderson', 'NASA', '6', '38:28'], ['29', 'Vinogradov Pavel Vinogradov', 'RSA', '7', '38:25']]}