CREATE TABLE "specific_fuel_consumption_sfc_specific_i" (
  "engine_type" text,
  "scenario" text,
  "sfc_in_lb_lbf_h" real,
  "sfc_in_g_k_n_s" real,
  "specific_impulse_s" real,
  "effective_exhaust_velocity_m_s" real
);

Question: What is the average SFC in lb/(lbf·h) for engines with an Effective exhaust velocity (m/s) larger than 29,553, and a SFC in g/(kN·s) of 17.1?
SQL: SELECT AVG("sfc_in_lb_lbf_h") FROM "specific_fuel_consumption_sfc_specific_i" WHERE "effective_exhaust_velocity_m_s">'29,553' AND "sfc_in_g_k_n_s"=17.1;

Question: What is the specific impulse for the engine with a scenario of sr-71 at mach 3.2 (wet)?
SQL: SELECT "specific_impulse_s" FROM "specific_fuel_consumption_sfc_specific_i" WHERE "scenario"='sr-71 at mach 3.2 (wet)';

Question: 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
SQL: SELECT AVG("specific_impulse_s") FROM "specific_fuel_consumption_sfc_specific_i" WHERE "sfc_in_lb_lbf_h"=7.95 AND "effective_exhaust_velocity_m_s">'4,423';