Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_24418525_1 (callsign VARCHAR, coverage VARCHAR)
### Question:
when coverage is dumaguete central visayas region, what is the callsign?
### Answer:
SELECT callsign FROM table_24418525_1 WHERE coverage = "Dumaguete Central Visayas Region"