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_59 (rank INTEGER, result VARCHAR, group VARCHAR, athlete VARCHAR)
### Question:
What is the average rank for Group A athlete Yanina Karolchyk, and a result higher than 18?
### Answer:
SELECT AVG(rank) FROM table_name_59 WHERE group = "a" AND athlete = "yanina karolchyk" AND result > 18