Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_68 (erp_w VARCHAR, frequency_mhz VARCHAR, city_of_license VARCHAR)

### Question ###
What is the ERP W of a Frequency MHz greater than 89.5 in the city of Washburn, Texas?

### Accurate SQL ###

SELECT erp_w FROM table_name_68 WHERE frequency_mhz > 89.5 AND city_of_license = "washburn, texas"