Name the call sign for ERP W of 4
CREATE TABLE table_name_20 (call_sign VARCHAR, erp_w VARCHAR)
SELECT call_sign FROM table_name_20 WHERE erp_w = 4
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_20 (call_sign VARCHAR, erp_w VARCHAR) Question: Name the call sign for ERP W of 4 [/INST] SELECT call_sign FROM table_name_20 WHERE erp_w = 4 </s>