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_97 (diameter__km_ INTEGER, name VARCHAR)
### Question:
What is the smallest diameter for Eirene Tholus?
### Answer:
SELECT MIN(diameter__km_) FROM table_name_97 WHERE name = "eirene tholus"