CREATE TABLE table_75031 ("Call sign" TEXT, "Analog channel" TEXT, "Digital channel" TEXT, "Virtual channel" TEXT, "Network" TEXT, "Station Ownership" TEXT)

Virtual channel of 16.5 has what call sign?
SELECT "Call sign" FROM table_75031 WHERE "Virtual channel" = '16.5'
SELECT "Call sign" FROM "table_75031" WHERE "Virtual channel" = '16.5'