What is the CHI (Carvill Hurricane Index) when the NHC advisory number is equal to 49b?
CREATE TABLE table_15416002_1 (
    chi VARCHAR,
    nhc_advisory_number VARCHAR
)
SELECT chi FROM table_15416002_1 WHERE nhc_advisory_number = "49B"
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 CHI (Carvill Hurricane Index) when the NHC advisory number is equal to 49b? ### Input: CREATE TABLE table_15416002_1 (
    chi VARCHAR,
    nhc_advisory_number VARCHAR
) ### Response: SELECT chi FROM table_15416002_1 WHERE nhc_advisory_number = "49B"