What is Call Sign, when ERP W is greater than 50?
CREATE TABLE table_name_56 (call_sign VARCHAR, erp_w INTEGER)
SELECT call_sign FROM table_name_56 WHERE erp_w > 50
### Context: CREATE TABLE table_name_56 (call_sign VARCHAR, erp_w INTEGER) ### Question: What is Call Sign, when ERP W is greater than 50? ### Answer: SELECT call_sign FROM table_name_56 WHERE erp_w > 50