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_15944_5 (sfc_in_g__kn·s_ VARCHAR, specific_impulse__s_ VARCHAR)
### Question:
What is the SFC when the specific impulse is 453?
### Answer:
SELECT sfc_in_g__kn·s_ FROM table_15944_5 WHERE specific_impulse__s_ = 453