Table schema:
CREATE TABLE table_name_6 (international_tourist_arrivals__2011_ VARCHAR, international_tourist_arrivals__2012_ VARCHAR)

Question: In 2011, how many tourists visited the country that had 23.4 million tourists in 2012?
SQL: SELECT international_tourist_arrivals__2011_ FROM table_name_6 WHERE international_tourist_arrivals__2012_ = "23.4 million"