What's the subject of 20 questions in those issues where Jillian Grace is the centerfold model?
CREATE TABLE table_1566852_6 (centerfold_model VARCHAR)
SELECT 20 AS _questions FROM table_1566852_6 WHERE centerfold_model = "Jillian Grace"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1566852_6 (centerfold_model VARCHAR) Question: What's the subject of 20 questions in those issues where Jillian Grace is the centerfold model? [/INST] SELECT 20 AS _questions FROM table_1566852_6 WHERE centerfold_model = "Jillian Grace" </s>