CREATE TABLE table_72492 ("City" TEXT, "Station" TEXT, "Year acquired" FLOAT, "Primary programming source" TEXT, "Other programming sources" TEXT, "Current status" TEXT)

how many channels were gained in 1997
SELECT COUNT("Other programming sources") FROM table_72492 WHERE "Year acquired" = '1997'
SELECT COUNT("Other programming sources") FROM "table_72492" WHERE "Year acquired" = '1997'