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_82 (rank INTEGER, studio VARCHAR, director VARCHAR)
### Question:
What was the average rank for the film directed by roland emmerich under the studio of 20th century fox?
### Answer:
SELECT AVG(rank) FROM table_name_82 WHERE studio = "20th century fox" AND director = "roland emmerich"