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_88 (release_year_of_first_charted_record INTEGER, artist VARCHAR)
### Question:
What was the earliest release-year of the first charted record of Abba?
### Answer:
SELECT MIN(release_year_of_first_charted_record) FROM table_name_88 WHERE artist = "abba"