How many tries for are for 473 points for?
{'header': ['Club', 'Played', 'Won', 'Drawn', 'Lost', 'Points for', 'Points against', 'Tries for', 'Tries against', 'Try bonus', 'Losing bonus', 'Points'], 'page_title': 'WRU Division Two West', 'page_id': '', 'types': ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-12828723-4', 'section_title': '2008/2009 table', 'caption': '2008/2009 table', 'rows': [['Club', 'Played', 'Won', 'Drawn', 'Lost', 'Points for', 'Points against', 'Tries for', 'Tries against', 'Try bonus', 'Losing bonus', 'Points'], ['Bridgend Athletic RFC', '22', '16', '0', '6', '523', '303', '68', '31', '10', '4', '78'], ['Builth Wells RFC', '22', '17', '0', '5', '473', '305', '57', '29', '7', '2', '77'], ['Kidwelly RFC', '22', '14', '1', '7', '532', '386', '63', '45', '5', '3', '66'], ['Loughor RFC', '22', '13', '1', '8', '532', '388', '69', '43', '9', '1', '64'], ['Ammanford RFC', '22', '13', '0', '9', '447', '394', '58', '51', '6', '4', '62'], ['Waunarlwydd RFC', '22', '12', '2', '8', '504', '439', '57', '55', '6', '3', '61'], ['Pencoed RFC', '22', '13', '0', '9', '425', '328', '53', '36', '4', '4', '60'], ['BP RFC', '22', '9', '1', '12', '367', '358', '39', '43', '2', '7', '47'], ['Mumbles RFC', '22', '8', '2', '12', '373', '450', '50', '56', '4', '4', '44'], ['Cwmavon RFC', '22', '6', '2', '14', '332', '515', '39', '66', '3', '5', '36'], ['Penclawdd RFC', '22', '4', '1', '17', '263', '520', '28', '68', '1', '3', '22'], ['Gorseinon RFC', '22', '2', '0', '20', '340', '725', '48', '106', '3', '4', '15']], 'name': 'table_12828723_4'}