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_19948664_2 ( ranking_la__2_ VARCHAR, world_ranking__1_ VARCHAR )

### Question ###
How many items were under ranking l.a.(2) when the world ranking was 21st?

### Accurate SQL ###

SELECT COUNT(ranking_la__2_) FROM table_19948664_2 WHERE world_ranking__1_ = "21st"