instruction: 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?
response: SELECT AVG("SFC in lb/(lbf\u00b7h)") FROM table_46801 WHERE "Effective exhaust velocity (m/s)" > '29,553' AND "SFC in g/(kN\u00b7s)" = '17.1'