what is the polluntant when the regulatory citation is 40 cfr 50.7(a) and the type is primary?
CREATE TABLE table_name_27 (
    pollutant VARCHAR,
    regulatory_citation VARCHAR,
    type VARCHAR
)
SELECT pollutant FROM table_name_27 WHERE regulatory_citation = "40 cfr 50.7(a)" AND type = "primary"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: what is the polluntant when the regulatory citation is 40 cfr 50.7(a) and the type is primary? ### Input: CREATE TABLE table_name_27 (
    pollutant VARCHAR,
    regulatory_citation VARCHAR,
    type VARCHAR
) ### Response: SELECT pollutant FROM table_name_27 WHERE regulatory_citation = "40 cfr 50.7(a)" AND type = "primary"