Table schema:
CREATE TABLE table_17039232_3 (replaced_by VARCHAR, date_of_vacancy VARCHAR, position_in_table VARCHAR)

Question: Name the replaced by where date of vacancy is 31 december 2008 where position in table is 1st
SQL: SELECT replaced_by FROM table_17039232_3 WHERE date_of_vacancy = "31 December 2008" AND position_in_table = "1st"