CREATE TABLE table_2201 ("Index  ( Year ) " CLOB, "Author / Editor / Source" CLOB, "Year of publication" CLOB, "Countries sampled" FLOAT, "World Ranking  ( 1 ) " CLOB, "Ranking L.A.  ( 2 ) " CLOB)

How many countries were sampled for the index in 2nd place in the LA ranking and 23rd in the world ranking?
SELECT "Countries sampled" FROM table_2201 WHERE "Ranking L.A. (2)" = '2nd' AND "World Ranking (1)" = '23rd'
SELECT "Countries sampled" FROM "table_2201" WHERE "Ranking L.A. (2)" = '2nd' AND "World Ranking (1)" = '23rd'