what was the next publication after the june 2010 publication of radio nacional de venezuela ?
CREATE TABLE table_204_639 (
    id number,
    "poll company" text,
    "source" text,
    "publication date" text,
    "psuv" number,
    "opposition" number,
    "undecided" number
)
SELECT "source" FROM table_204_639 WHERE id = (SELECT id FROM table_204_639 WHERE "publication date" = 'june 2010' AND "source" = 'radio nacional de venezuela') + 1
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 was the next publication after the june 2010 publication of radio nacional de venezuela ? ### Input: CREATE TABLE table_204_639 (
    id number,
    "poll company" text,
    "source" text,
    "publication date" text,
    "psuv" number,
    "opposition" number,
    "undecided" number
) ### Response: SELECT "source" FROM table_204_639 WHERE id = (SELECT id FROM table_204_639 WHERE "publication date" = 'june 2010' AND "source" = 'radio nacional de venezuela') + 1