Question: Which 2008 has a City of Durban?
SQL: SELECT AVG("2008") FROM "2-18600121-5" WHERE "City" = 'Durban';

Question: Which Country has a Change (08/07) of unknown, and a 2008 larger than 1102497, and a City of Luanda?
SQL: SELECT "Country" FROM "2-18600121-5" WHERE "Change (08/07)" = 'unknown' AND "2008" > 1102497.0 AND "City" = 'Luanda';

Question: Which 2008 has an Airport of Hurghada International Airport?
SQL: SELECT AVG("2008") FROM "2-18600121-5" WHERE "Airport" = 'Hurghada International Airport';

Question: Which 2008 has an Airport of Julius Nyerere International Airport?
SQL: SELECT AVG("2008") FROM "2-18600121-5" WHERE "Airport" = 'Julius Nyerere International Airport';