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_28606933_7 (period VARCHAR, position VARCHAR)
### Question:
What period(s) featured a left inside linebacker?
### Answer:
SELECT period FROM table_28606933_7 WHERE position = "Left inside linebacker"