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_2102898_1 ( archive VARCHAR, broadcast_date VARCHAR )

### Question ###
What is the archive of the show that aired on 18april1970?

### Accurate SQL ###

SELECT archive FROM table_2102898_1 WHERE broadcast_date = "18April1970"