When 656000 is the amount of viewers and n/a is the cable rank what is the airdate?
CREATE TABLE table_24399615_8 (airdate VARCHAR, cable_rank VARCHAR, viewers VARCHAR)
SELECT airdate FROM table_24399615_8 WHERE cable_rank = "N/A" AND viewers = 656000
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_24399615_8 (airdate VARCHAR, cable_rank VARCHAR, viewers VARCHAR) Question: When 656000 is the amount of viewers and n/a is the cable rank what is the airdate? [/INST] SELECT airdate FROM table_24399615_8 WHERE cable_rank = "N/A" AND viewers = 656000 </s>