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_38 (extras INTEGER, name VARCHAR, runs_conceded VARCHAR)
### Question:
What is the average Extras for Muttiah Muralitharan, with less than 353 Runs Conceded?
### Answer:
SELECT AVG(extras) FROM table_name_38 WHERE name = "muttiah muralitharan" AND runs_conceded < 353