How many losses does the club with 539 points for have?
{'header': ['Club', 'Played', 'Won', 'Drawn', 'Lost', 'Points for', 'Points against', 'Points difference', 'Points'], 'page_title': 'Welsh Premier Division', 'page_id': '', 'types': ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-1676073-13', 'section_title': '2004-05 Table', 'caption': '2004-05 Table', 'rows': [['Club', 'Played', 'Won', 'Drawn', 'Lost', 'Points for', 'Points against', 'Points difference', 'Points'], ['Neath RFC', '32', '27', '0', '5', '1028', '401', '+627', '81'], ['Newport RFC', '32', '25', '0', '7', '905', '526', '+379', '72'], ['Bridgend Ravens', '32', '23', '0', '9', '736', '475', '+261', '66'], ['Llanelli RFC', '32', '20', '0', '12', '784', '587', '+197', '60'], ['Aberavon RFC', '32', '19', '0', '13', '782', '760', '+22', '57'], ['Cross Keys RFC', '32', '19', '0', '13', '671', '760', '-89', '57'], ['Carmarthen Quins RFC', '32', '18', '1', '13', '785', '579', '+206', '55'], ['Cardiff RFC', '32', '18', '0', '14', '835', '569', '+266', '54'], ['Swansea RFC', '32', '17', '2', '13', '840', '731', '+109', '53'], ['Pontypridd RFC', '32', '17', '1', '14', '729', '610', '+119', '52'], ['Ebbw Vale RFC', '32', '14', '0', '18', '644', '819', '-175', '39'], ['Pontypool RFC', '32', '12', '1', '19', '635', '786', '-151', '37'], ['Bedwas RFC', '32', '12', '0', '20', '565', '747', '-182', '36'], ['Llandovery RFC', '32', '12', '0', '20', '597', '873', '-276', '36'], ['Caerphilly RFC', '32', '8', '0', '24', '693', '945', '-252', '24'], ['Llanharan RFC', '32', '4', '1', '27', '548', '1054', '-506', '13'], ['Newbridge RFC', '32', '4', '0', '28', '539', '1183', '-644', '6']], 'name': 'table_1676073_13'}