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_name_29 (rank INTEGER, source VARCHAR, year VARCHAR)
### Question:
What is the average rank that has cia world factbook as the source and a year prior to 2005?
### Answer:
SELECT AVG(rank) FROM table_name_29 WHERE source = "cia world factbook" AND year < 2005