CREATE TABLE table_name_2 (third_member VARCHAR(255), second_member VARCHAR(255), second_party VARCHAR(255), third_party VARCHAR(255))
Who is the third member of the Liberal Party, a third party conservative, the second member Humphrey Mildmay?
    
SQL: SELECT third_member FROM table_name_2 WHERE second_party = "liberal" AND third_party = "conservative" AND second_member = "humphrey mildmay"