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_20728138_1 (_percentage_in_seats_contested VARCHAR, party VARCHAR)

### Question ###
What is the percentage seats contested for the revolutionary socialist party?

### Accurate SQL ###

SELECT _percentage_in_seats_contested FROM table_20728138_1 WHERE party = "Revolutionary Socialist party"