user: Question: On what date was the Canarian Workers Socialist Union registered?
Columns: ['Party', 'Name in English', 'City', 'Province', 'Date of registration']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Partido Obrero y Campesino', 'Workers and Peasants Party', 'Madrid', 'Madrid', '1979-01-02']
SQL:

assistant: SELECT "Date of registration" FROM "Table" WHERE "Name in English" = 'Canarian Workers Socialist Union';