What is the national rank of Windstream?
CREATE TABLE table_21926985_2 (national_rank INTEGER, company_name VARCHAR)
SELECT MIN(national_rank) FROM table_21926985_2 WHERE company_name = "Windstream"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21926985_2 (national_rank INTEGER, company_name VARCHAR) Question: What is the national rank of Windstream? [/INST] SELECT MIN(national_rank) FROM table_21926985_2 WHERE company_name = "Windstream" </s>