The MacKinnon Stakes races took place on how many venues?
CREATE TABLE table_24850630_3 (venue VARCHAR, race VARCHAR)
SELECT COUNT(venue) FROM table_24850630_3 WHERE race = "Mackinnon Stakes"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_24850630_3 (venue VARCHAR, race VARCHAR) Question: The MacKinnon Stakes races took place on how many venues? [/INST] SELECT COUNT(venue) FROM table_24850630_3 WHERE race = "Mackinnon Stakes" </s>