Question: Which station has a frequency of 873kHz?
SQL: SELECT "Station" FROM "2-1837570-2" WHERE "Frequency" = '873kHz';

Question: Where is the transmitter located for the station Voice of Vietnam
SQL: SELECT "Transmitter location" FROM "2-1837570-2" WHERE "Station" = 'Voice of Vietnam';

Question: Which station is from China and has a frequency of 684kHz?
SQL: SELECT "Station" FROM "2-1837570-2" WHERE "Country of origin" = 'China' AND "Frequency" = '684kHz';