Question: What aircraft is located at S of Avion?
SQL: SELECT "Aircraft" FROM "2-17850104-1" WHERE "Location" = 'S of Avion';

Question: What is the Unit for the Aircraft F.E.2b, located in Logeast?
SQL: SELECT SUM("Unit") FROM "2-17850104-1" WHERE "Aircraft" = 'F.E.2b' AND "Location" = 'Logeast';