user: Question: When was the locomotive named Fighter Command built?
Columns: ['BRNo.', 'SRNo.', 'Name', 'Builder', 'Whenbuilt', 'Withdrawn']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [34001.0, '21C101', 'Exeter', 'Brighton', 'Cannot handle non-empty timestamp argument! 1945', 'Cannot handle non-empty timestamp argument! 1967']
SQL:

assistant: SELECT "Whenbuilt" FROM "Table" WHERE "Name" = 'Fighter Command';