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_80 (build_date VARCHAR, prr_class VARCHAR)
### Question:
What is the build date for PRR Class gf30a?
### Answer:
SELECT build_date FROM table_name_80 WHERE prr_class = "gf30a"