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_54 (number INTEGER, pieces VARCHAR, name VARCHAR)
### Question:
What is the number for Chauchilla Cemetery Battle with less than 511 pieces?
### Answer:
SELECT AVG(number) FROM table_name_54 WHERE pieces < 511 AND name = "chauchilla cemetery battle"