Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Branding | Callsign | Frequency | Power kW | Coverage |
| --- | --- | --- | --- | --- |
| 106.7 Energy FM | DWET-FM | 106.7MHz | 25kW | Mega Manila |
| 106.3 Energy FM Naga | DWBQ-FM | 106.3MHz | 10kW | Naga Bicol Region |
| 94.7 Energy FM Cebu | DYLL-FM | 94.7MHz | 20kW | Cebu Visayas Region |
| 93.7 Energy FM Dumaguete | DYMD-FM | 93.7 MHz | 10 kW | Dumaguete Central Visayas Region |
| 103.7 Energy FM Dipolog* | DXRU-FM | 103.7MHz | 5kW | Dipolog Western Mindanao Region |
| 88.3 Energy FM Davao | DXDR-FM | 88.3MHz | 10kW | Davao Mindanao Region |
Question:
when coverage is dumaguete central visayas region, what is the callsign?
Answer:
DYMD-FM