When was Kalin Olson listed as  the centerfold model?
CREATE TABLE table_1566850_8 (date VARCHAR, centerfold_model VARCHAR)
SELECT date FROM table_1566850_8 WHERE centerfold_model = "Kalin Olson"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1566850_8 (date VARCHAR, centerfold_model VARCHAR) Question: When was Kalin Olson listed as  the centerfold model? [/INST] SELECT date FROM table_1566850_8 WHERE centerfold_model = "Kalin Olson" </s>