Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_15416002_1 (chi VARCHAR, nhc_advisory_number VARCHAR)
### Question:
What is the CHI (Carvill Hurricane Index) when the NHC advisory number is equal to 49b?
### Answer:
SELECT chi FROM table_15416002_1 WHERE nhc_advisory_number = "49B"