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_20728138_1 (_percentage_in_seats_contested VARCHAR, party VARCHAR)
### Question:
What is the percentage seats contested for the revolutionary socialist party?
### Answer:
SELECT _percentage_in_seats_contested FROM table_20728138_1 WHERE party = "Revolutionary Socialist party"