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_32 (removal_treaty__year_signed_ VARCHAR, nation VARCHAR)
### Question:
Which removal treaty covered the chickasaw nation?
### Answer:
SELECT removal_treaty__year_signed_ FROM table_name_32 WHERE nation = "chickasaw"