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_6 (est VARCHAR, city VARCHAR, state_province VARCHAR, league VARCHAR)
### Question:
In what year was the cfl team in edmonton, alberta established?
### Answer:
SELECT est FROM table_name_6 WHERE state_province = "alberta" AND league = "cfl" AND city = "edmonton"