What is the 20 year for Sulfur Hexafluoride?
CREATE TABLE table_21350772_2 (gas_name VARCHAR)
SELECT 20 AS _yr FROM table_21350772_2 WHERE gas_name = "Sulfur hexafluoride"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21350772_2 (gas_name VARCHAR) Question: What is the 20 year for Sulfur Hexafluoride? [/INST] SELECT 20 AS _yr FROM table_21350772_2 WHERE gas_name = "Sulfur hexafluoride" </s>