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_1397655_1 ( other_programming_sources VARCHAR, year_acquired VARCHAR )

### Question ###
how many channels were gained in 1997

### Accurate SQL ###

SELECT COUNT(other_programming_sources) FROM table_1397655_1 WHERE year_acquired = 1997