when coverage is dumaguete central visayas region, what is the callsign?
CREATE TABLE table_24418525_1 (callsign VARCHAR, coverage VARCHAR)
SELECT callsign FROM table_24418525_1 WHERE coverage = "Dumaguete Central Visayas Region"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_24418525_1 (callsign VARCHAR, coverage VARCHAR) Question: when coverage is dumaguete central visayas region, what is the callsign? [/INST] SELECT callsign FROM table_24418525_1 WHERE coverage = "Dumaguete Central Visayas Region" </s>