user: Question: Who is the head linesman of the game on 1 February 2009?
Columns: ['Game', 'Date', 'Referee', 'Umpire', 'Head Linesman', 'Line Judge', 'Field Judge', 'Back Judge']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['V', '17 January 1971', 'Norm Schachter', 'Paul Trepinski', 'Ed Marion', 'Jack Fette', 'Fritz Graf', 'Hugh Gamber']
SQL:

assistant: SELECT "Head Linesman" FROM "Table" WHERE "Date" = '1 February 2009';