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 ( affiliation VARCHAR, owned_since VARCHAR, channel___tv___rf__ VARCHAR )

### Question ###
What affiliation has an owned since larger than 1991, and also has a channel (tv/rf) of 42?

### Accurate SQL ###

SELECT affiliation FROM table_name_58 WHERE owned_since > 1991 AND channel___tv___rf__ = "42"