what is the average specific impulse for engines that have a SFC in lb/(lbf h) of 7.95, and a Effective exhaust velocity (m/s) larger than 4,423
CREATE TABLE table_name_66 (
    specific_impulse__s_ INTEGER,
    sfc_in_lb__lbf·h_ VARCHAR,
    effective_exhaust_velocity__m_s_ VARCHAR
)
SELECT AVG(specific_impulse__s_) FROM table_name_66 WHERE sfc_in_lb__lbf·h_ = 7.95 AND effective_exhaust_velocity__m_s_ > 4 OFFSET 423
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 average specific impulse for engines that have a SFC in lb/(lbf h) of 7.95, and a Effective exhaust velocity (m/s) larger than 4,423 ### Input: CREATE TABLE table_name_66 (
    specific_impulse__s_ INTEGER,
    sfc_in_lb__lbf·h_ VARCHAR,
    effective_exhaust_velocity__m_s_ VARCHAR
) ### Response: SELECT AVG(specific_impulse__s_) FROM table_name_66 WHERE sfc_in_lb__lbf·h_ = 7.95 AND effective_exhaust_velocity__m_s_ > 4 OFFSET 423