What was the call sign for ERP W of 99?
CREATE TABLE table_name_68 (call_sign VARCHAR, erp_w VARCHAR)
SELECT call_sign FROM table_name_68 WHERE erp_w = 99
### Context: CREATE TABLE table_name_68 (call_sign VARCHAR, erp_w VARCHAR) ### Question: What was the call sign for ERP W of 99? ### Answer: SELECT call_sign FROM table_name_68 WHERE erp_w = 99