What is the average MHz Frequency of radio rezonans?
CREATE TABLE table_67920 (
    "Program" text,
    "Frequency MHz" real,
    "ERP kW" real,
    "Polarisation" text,
    "Antenna Diagram around (ND) / directional (D)" text
)
SELECT AVG("Frequency MHz") FROM table_67920 WHERE "Program" = 'radio rezonans'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the average MHz Frequency of radio rezonans? ### Input: CREATE TABLE table_67920 (
    "Program" text,
    "Frequency MHz" real,
    "ERP kW" real,
    "Polarisation" text,
    "Antenna Diagram around (ND) / directional (D)" text
) ### Response: SELECT AVG("Frequency MHz") FROM table_67920 WHERE "Program" = 'radio rezonans'