user: Question: On what date does the episode called "Triangles" air
Columns: ['#', 'Episode', 'Air Date', 'Timeslot (EST)', 'Rating', 'Share', '18-49 (Rating/Share)', 'Viewers (m)', 'Weekly Rank (#)']
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: [1.0, '"A Death in the Family"', 'October 1, 2009', 'Thursday 10:00 P.M.', '7.6', 13.0, '4.6/13', '11.58', '20']
SQL:

assistant: SELECT "Air Date" FROM "Table" WHERE "Episode" = '"Triangles"';