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_24765815_2 (competition VARCHAR, vote_percentage VARCHAR, nationality VARCHAR)

### Question ###
What's the name of the competition where the nationality is Brazil and the voting percentage is n/a?

### Accurate SQL ###

SELECT competition FROM table_24765815_2 WHERE vote_percentage = "N/A" AND nationality = "Brazil"