Question: Which Airline has a Fleet size larger than 17, and a IATA of PR?
SQL: SELECT "Airline" FROM "2-15637071-1" WHERE "Fleet size" > 17.0 AND "IATA" = 'PR';

Question: Which ICAO has a Fleet size of 2?
SQL: SELECT "ICAO" FROM "2-15637071-1" WHERE "Fleet size" = 2.0;

Question: What is the of Fleet size with a IATA of pr, and a Commenced operations smaller than 1941?
SQL: SELECT SUM("Fleet size") FROM "2-15637071-1" WHERE "IATA" = 'pr' AND "Commenced operations" < 1941.0;

Question: Which ICAO has a Commenced operations larger than 2011?
SQL: SELECT "ICAO" FROM "2-15637071-1" WHERE "Commenced operations" > 2011.0;