user: Question: What platform was used for the game directed by Bryan Walker after 2006?
Columns: ['Title', 'Year', 'Platform(s)', 'Director', 'Producer']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Metroid Prime 1', 2002.0, 'GCN', 'Mark Pacini', 'Kensuke Tanabe , Shigeru Miyamoto']
SQL:

assistant: SELECT "Platform(s)" FROM "Table" WHERE "Year" > 2006.0 AND "Director" = 'Bryan Walker';