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
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What was the call sign for ERP W of 99? ### Input: CREATE TABLE table_name_68 (
    call_sign VARCHAR,
    erp_w VARCHAR
) ### Response: SELECT call_sign FROM table_name_68 WHERE erp_w = 99