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_23394920_1 (station_type VARCHAR, callsign VARCHAR)
### Question:
When dxcc-tv is the call sign how many station types are there?
### Answer:
SELECT COUNT(station_type) FROM table_23394920_1 WHERE callsign = "DXCC-TV"