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_47 (erp_w INTEGER, call_sign VARCHAR)
### Question:
Which ERP W is the lowest one that has a Call sign of w233be?
### Answer:
SELECT MIN(erp_w) FROM table_name_47 WHERE call_sign = "w233be"