user: Question: Name the number of overall nt points for 248.9
Columns: ['Rank', 'Name', 'Nationality', '1st (m)', '2nd (m)', 'Points', 'Overall NT points', 'Overall WC points (Rank)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Gregor Schlierenzauer', 'AUT', '132.0', '129.5', '257.9', '632.3 (3)', '1261 (2)']
SQL:

assistant: SELECT "Overall NT points" FROM "Table" WHERE "Points" = '248.9';