Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_6 (erp_w INTEGER, frequency_mhz INTEGER)
### Question:
What is the ERP W number where the frequency is smaller than 91.1?
### Answer:
SELECT MAX(erp_w) FROM table_name_6 WHERE frequency_mhz < 91.1