query: SELECT region_name FROM region WHERE region_id NOT IN (SELECT region_id FROM affected_region)
question: Show the name for regions not affected.
query_toks: SELECT region_name FROM region WHERE region_id NOT IN ( SELECT region_id FROM affected_region )
query_toks_no_value: select region_name from region where region_id not in ( select region_id from affected_region )
question_toks: Show the name for regions not affected.