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_83 (period_active VARCHAR, release_year_of_first_charted_record VARCHAR, genre VARCHAR)
### Question:
What's the period of a rock album released in 1973?
### Answer:
SELECT period_active FROM table_name_83 WHERE release_year_of_first_charted_record = 1973 AND genre = "rock"