How many years was the 400 m event in the olympic games?
CREATE TABLE table_name_28 (year VARCHAR, competition VARCHAR, event VARCHAR)
SELECT COUNT(year) FROM table_name_28 WHERE competition = "olympic games" AND event = "400 m"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_28 (year VARCHAR, competition VARCHAR, event VARCHAR) Question: How many years was the 400 m event in the olympic games? [/INST] SELECT COUNT(year) FROM table_name_28 WHERE competition = "olympic games" AND event = "400 m" </s>