Name the number of overall nt points for 248.9
{'header': ['Rank', 'Name', 'Nationality', '1st (m)', '2nd (m)', 'Points', 'Overall NT points', 'Overall WC points (Rank)'], 'page_title': '2007–08 FIS Ski Jumping World Cup', 'page_id': '', 'types': ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-14407512-24', 'section_title': 'Lillehammer', 'caption': 'Lillehammer', 'rows': [['1', 'Gregor Schlierenzauer', 'AUT', '132.0', '129.5', '257.9', '632.3 (3)', '1261 (2)'], ['2', 'Andreas Küttel', 'SUI', '126.5', '133.0', '255.8', '573.3 (12)', '739 (6)'], ['3', 'Janne Happonen', 'FIN', '124.5', '135.0', '255.3', '634.2 (1)', '614 (10)'], ['4', 'Janne Ahonen', 'FIN', '126.5', '133.0', '253.8', '632.5 (2)', '1148 (3)'], ['5', 'Tom Hilde', 'NOR', '133.5', '123.0', '248.9', '622.1 (4)', '1072 (4)']], 'name': 'table_14407512_24'}