Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_19012 ( "Rank" real, "Airport" text, "Total Passengers" real, "% Change 2008/2009" text, "International Passengers" real, "Domestic Passengers" real, "Transit Passengers" real, "Aircraft Movements" real, "Freight ( Metric Tonnes )" real )

### Question ###
What is the rank of the airport with a freight ( metric tonnes ) of 23791?

### Accurate SQL ###

SELECT "Rank" FROM table_19012 WHERE "Freight ( Metric Tonnes )" = '23791'