Which formula has a refractive index 589.3 at 1.97?
CREATE TABLE table_name_63 (
    formula VARCHAR,
    refractive_index_es__5893nm VARCHAR
)
SELECT formula FROM table_name_63 WHERE refractive_index_es__5893nm = "1.97"
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: Which formula has a refractive index 589.3 at 1.97? ### Input: CREATE TABLE table_name_63 (
    formula VARCHAR,
    refractive_index_es__5893nm VARCHAR
) ### Response: SELECT formula FROM table_name_63 WHERE refractive_index_es__5893nm = "1.97"