how many persons got the fourth position when the regional was shikoku?
CREATE TABLE table_21632864_1 (fourth_place VARCHAR, regional VARCHAR)
SELECT COUNT(fourth_place) FROM table_21632864_1 WHERE regional = "Shikoku"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21632864_1 (fourth_place VARCHAR, regional VARCHAR) Question: how many persons got the fourth position when the regional was shikoku? [/INST] SELECT COUNT(fourth_place) FROM table_21632864_1 WHERE regional = "Shikoku" </s>