user: Question: What year was the walking dead?
Columns: ['Year', 'Game', 'Genre', 'Platform(s)', 'Developer(s)']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2007.0, 'Super Mario Galaxy', 'Platformer', 'Wii', 'Nintendo']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Game" = 'the walking dead';