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_81 (callsign VARCHAR, power__kw_ VARCHAR, location VARCHAR)

### Question ###
What is the callsign of Cagayan de Oro with 5kW?

### Accurate SQL ###

SELECT callsign FROM table_name_81 WHERE power__kw_ = "5kw" AND location = "cagayan de oro"