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_16799784_3 (diameter__km_ VARCHAR, year_named VARCHAR)
### Question:
What was the diameter of the feature found in 1997?
### Answer:
SELECT diameter__km_ FROM table_16799784_3 WHERE year_named = 1997