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 ( viewers__in_millions_ VARCHAR, broadcast_date VARCHAR )

### Question ###
On broadcast date is 25april1970, how many people tuned in?

### Accurate SQL ###

SELECT viewers__in_millions_ FROM table_2102898_1 WHERE broadcast_date = "25April1970"