What is average frequency MHZ when is in portales, new mexico?
CREATE TABLE table_43709 (
    "Call sign" text,
    "Frequency MHz" real,
    "City of license" text,
    "ERP W" real,
    "FCC info" text
)
SELECT AVG("Frequency MHz") FROM table_43709 WHERE "City of license" = 'portales, new mexico'
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 average frequency MHZ when is in portales, new mexico? ### Input: CREATE TABLE table_43709 (
    "Call sign" text,
    "Frequency MHz" real,
    "City of license" text,
    "ERP W" real,
    "FCC info" text
) ### Response: SELECT AVG("Frequency MHz") FROM table_43709 WHERE "City of license" = 'portales, new mexico'