พรรคสังคมนิยมปฏิวัติถูกริบไปกี่ที่นั่ง?ไม่จำเป็นที่จะต้องใช้โต๊ะทั้งหมด
How many seats were forfeited in the revolutionary socialist party?It is not neccessary to use all the tables.
 table_20728138_1:  (seats_forfeited [ VARCHAR ] party [ VARCHAR) ]
SELECT COUNT(seats_forfeited) FROM table_20728138_1 WHERE party = "Revolutionary Socialist party"