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_17 (start INTEGER, year VARCHAR, engine VARCHAR, finish VARCHAR)
### Question:
How many starts are associated with an oldsmobile engine, 21 finishes and before 2001?
### Answer:
SELECT SUM(start) FROM table_name_17 WHERE engine = "oldsmobile" AND finish = 21 AND year < 2001