How many calibers require the type LB/RN?
CREATE TABLE table_21538523_1 (caliber VARCHAR, type VARCHAR)
SELECT COUNT(caliber) FROM table_21538523_1 WHERE type = "LB/RN"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21538523_1 (caliber VARCHAR, type VARCHAR) Question: How many calibers require the type LB/RN? [/INST] SELECT COUNT(caliber) FROM table_21538523_1 WHERE type = "LB/RN" </s>