user: Question: In what season was the final placing NC† and the team SL Formula Racing? 
Columns: ['Season', 'Series', 'Team Name', 'Races', 'Wins', 'Points', 'Final Placing']
Types: ['real', 'text', 'text', 'real', 'real', 'text', 'text']
Sample row: [2007.0, 'Formula Renault 2.0 NEC', 'SL Formula Racing', 16.0, 0.0, '67', '21st']
SQL:

assistant: SELECT "Season" FROM "Table" WHERE "Final Placing" = 'NC†' AND "Team Name" = 'SL Formula Racing';