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_name_58 (sport VARCHAR, age_groups VARCHAR, competition_name VARCHAR)

### Question ###
what is the sport when the age group is 21 or younger and the competition name is world youth netball championships?

### Accurate SQL ###

SELECT sport FROM table_name_58 WHERE age_groups = "21 or younger" AND competition_name = "world youth netball championships"