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_18602462_21 (quarterfinals VARCHAR, athlete VARCHAR)
### Question:
When bas van erp was the athlete what was the quarterfinals?
### Answer:
SELECT quarterfinals FROM table_18602462_21 WHERE athlete = "Bas van Erp"