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_87 (date VARCHAR, week VARCHAR, opponent VARCHAR)
### Question:
When did the Chargers play the Denver Broncos before Week 10?
### Answer:
SELECT date FROM table_name_87 WHERE week < 10 AND opponent = "denver broncos"