What was the minimum points against if the opponent is Port Adelaide?
CREATE TABLE table_25229283_4 (points_against INTEGER, opponent VARCHAR)
SELECT MIN(points_against) FROM table_25229283_4 WHERE opponent = "Port Adelaide"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_25229283_4 (points_against INTEGER, opponent VARCHAR) Question: What was the minimum points against if the opponent is Port Adelaide? [/INST] SELECT MIN(points_against) FROM table_25229283_4 WHERE opponent = "Port Adelaide" </s>