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