Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_26 (shutdown VARCHAR, electricity_grid VARCHAR)
### Question:
When did the Electricity Grid 28.12.1972 officially shutdown?
### Answer:
SELECT shutdown FROM table_name_26 WHERE electricity_grid = "28.12.1972"