Who had the fastest lap of the race that Ayrton Senna won on 23 April?
CREATE TABLE table_name_4 (fastest_lap VARCHAR, winning_driver VARCHAR, date VARCHAR)
SELECT fastest_lap FROM table_name_4 WHERE winning_driver = "ayrton senna" AND date = "23 april"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_4 (fastest_lap VARCHAR, winning_driver VARCHAR, date VARCHAR) Question: Who had the fastest lap of the race that Ayrton Senna won on 23 April? [/INST] SELECT fastest_lap FROM table_name_4 WHERE winning_driver = "ayrton senna" AND date = "23 april" </s>