Where is Dwain Chambers from
{'header': ['Rank', 'Fastest time (s)', 'Wind (m/s)', 'Athlete', 'Country', 'Date', 'Location'], 'page_title': '100 metres', 'page_id': '', 'types': ['real', 'text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-1231316-4', 'section_title': 'Junior (under-20) men', 'caption': 'Junior (under-20) men', 'rows': [['1', '10.01', '+0.0', 'Darrel Brown', 'Trinidad and Tobago', '24 August 2003', 'Paris'], ['1', '10.01', '+1.6', 'Jeff Demps', 'United States', '28 June 2008', 'Eugene'], ['1', '10.01', '+0.9', 'Yoshihide Kiryu', 'Japan', '29 April 2013', 'Hiroshima'], ['4', '10.03', '+0.7', 'Marcus Rowland', 'United States', '31 July 2009', 'Port of Spain'], ['5', '10.04', '+1.7', "D'Angelo Cherry", 'United States', '10 June 2009', 'Fayetteville'], ['5', '10.04', '+0.2', 'Christophe Lemaitre', 'France', '24 July 2009', 'Novi Sad'], ['7', '10.05', '+0.1', 'Adam Gemili', 'Great Britain', '11 July 2012', 'Barcelona'], ['8', '10.06', '+2.0', 'Dwain Chambers', 'Great Britain', '25 July 1997', 'Ljubljana'], ['8', '10.06', '+1.5', 'Walter Dix', 'United States', '27 May 2005', 'New York City'], ['10', '10.07', '+2.0', 'Stanley Floyd', 'United States', '24 May 1980', 'Austin'], ['10', '10.07', '+1.1', 'DaBryan Blanton', 'United States', '30 May 2003', 'Lincoln'], ['10', '10.07', '+0.2', 'Tamunosiki Atorudibo', 'Nigeria', '8 July 2004', 'Abuja']], 'name': 'table_1231316_4'}