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_21821014_1 (installation_date VARCHAR, chapter VARCHAR)
### Question:
What is the installation date for the Delta Chapter?
### Answer:
SELECT installation_date FROM table_21821014_1 WHERE chapter = "Delta"