user: Question: What is the Alpha 2 code for the area also known as TCA?
Columns: ['English short name (upper/lower case)', 'Alpha-2 code', 'Alpha-3 code', 'Numeric code', 'ISO 3166-2 codes']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Afghanistan', 'AF', 'AFG', 4.0, 'ISO 3166-2:AF']
SQL:

assistant: SELECT "Alpha-2 code" FROM "Table" WHERE "Alpha-3 code" = 'TCA';