What is the lifetime (years) for chemical formula ch 4?
CREATE TABLE table_21350772_2 (lifetime__years_ VARCHAR, chemical_formula VARCHAR)
SELECT lifetime__years_ FROM table_21350772_2 WHERE chemical_formula = "CH 4"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21350772_2 (lifetime__years_ VARCHAR, chemical_formula VARCHAR) Question: What is the lifetime (years) for chemical formula ch 4? [/INST] SELECT lifetime__years_ FROM table_21350772_2 WHERE chemical_formula = "CH 4" </s>