user: Question: Who was team 1 when the Chalkheads were team 2?
Columns: ['Episode #', 'Air date', 'Team 1', 'Players left after Round 1', 'Team 2']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, '28 July 2008', "Di's Diamonds*", '5 - 2', 'Poachers']
SQL:

assistant: SELECT "Team 1" FROM "Table" WHERE "Team 2" = 'Chalkheads';