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_16 (city VARCHAR, venue VARCHAR, year VARCHAR)
### Question:
What city has riverside ground as the venue, with a year prior to 1998?
### Answer:
SELECT city FROM table_name_16 WHERE venue = "riverside ground" AND year < 1998