Question: how many Curtiss XBTC aircraft are retired?
SQL: SELECT COUNT("Retired") FROM "1-13605170-2" WHERE "Aircraft type" = 'Curtiss XBTC';

Question: How many Airspeed Fleet Shadower aircraft are retired?
SQL: SELECT "Retired" FROM "1-13605170-2" WHERE "Aircraft type" = 'Airspeed Fleet Shadower';

Question: What is the origin of aircraft in service in 1943 and retired in 1954?
SQL: SELECT "National Origin" FROM "1-13605170-2" WHERE "Retired" = '1954' AND "In Service" = '1943';