Question: Who is the Author/Editor/Source for more than 100 countries sampled and has a 35 world ranking?
SQL: SELECT "Author / Editor / Source" FROM "2-18749714-1" WHERE "World Ranking (1)" = '35' AND "Countries sampled" > 100.0;

Question: How many countries sampled has a world ranking of 33 in 2010 and less than 3 ranking in Latin America?
SQL: SELECT SUM("Countries sampled") FROM "2-18749714-1" WHERE "Year of publication" = '2010' AND "World Ranking (1)" = '33' AND "Ranking in Latin America (2)" < 3.0;

Question: What's the world ranking in 2011 having more than 142 countries sampled, and more than a 3 for ranking in Latin America?
SQL: SELECT "World Ranking (1)" FROM "2-18749714-1" WHERE "Year of publication" = '2011' AND "Ranking in Latin America (2)" > 3.0 AND "Countries sampled" > 142.0;