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_91 (attendance INTEGER, date VARCHAR, week VARCHAR)
### Question:
What was the Attendance on December 21, 1986 before Week 16?
### Answer:
SELECT SUM(attendance) FROM table_name_91 WHERE date = "december 21, 1986" AND week < 16