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_22 (pl_gp INTEGER, reg_gp INTEGER)
### Question:
What's the highest Pl GP with a Reg GP over 18?
### Answer:
SELECT MAX(pl_gp) FROM table_name_22 WHERE reg_gp > 18