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_85 (charter_range VARCHAR, school VARCHAR)
### Question:
What are the active dates for the Montana State University chapter?
### Answer:
SELECT charter_range FROM table_name_85 WHERE school = "montana state university"