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_69 (capacity INTEGER, head_coach VARCHAR)
### Question:
What is the Capacity of the Rainer Kraft's Stadium?
### Answer:
SELECT AVG(capacity) FROM table_name_69 WHERE head_coach = "rainer kraft"