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_16537783_2 (parameter VARCHAR)
### Question:
Name the 1st stage for parameter being diameter
### Answer:
SELECT 1 AS st_stage FROM table_16537783_2 WHERE parameter = "Diameter"