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_name_1 (network VARCHAR, d_erp VARCHAR, callsign VARCHAR)
### Question:
What's the network that has a callsign of XHTM and a D ERP of •?
### Answer:
SELECT network FROM table_name_1 WHERE d_erp = "•" AND callsign = "xhtm"