What is the model number introduced May 1999?
CREATE TABLE table_10528691_4 (model INTEGER, introduction VARCHAR)
SELECT MAX(model) FROM table_10528691_4 WHERE introduction = "May 1999"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_10528691_4 (model INTEGER, introduction VARCHAR) Question: What is the model number introduced May 1999? [/INST] SELECT MAX(model) FROM table_10528691_4 WHERE introduction = "May 1999" </s>