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_21489362_2 (rr3_pts INTEGER, rr4_pts VARCHAR)
### Question:
When 20 is the rr4 points what is the lowest rr3 points?
### Answer:
SELECT MIN(rr3_pts) FROM table_21489362_2 WHERE rr4_pts = "20"