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_18 (original_week INTEGER, venue VARCHAR)
### Question:
Tell me the average original week for soldier field
### Answer:
SELECT AVG(original_week) FROM table_name_18 WHERE venue = "soldier field"