What is the largest series number? 
CREATE TABLE table_19517621_4 (series__number INTEGER)
SELECT MAX(series__number) FROM table_19517621_4
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_19517621_4 (series__number INTEGER) Question: What is the largest series number?  [/INST] SELECT MAX(series__number) FROM table_19517621_4 </s>