Who were the directors of the episode 'nano nits' written by nathan cockerill?
CREATE TABLE table_25687 (
    "Episode Number" text,
    "Title" text,
    "Villains" text,
    "Director" text,
    "Writer" text,
    "Original airdate" text
)
SELECT "Director" FROM table_25687 WHERE "Writer" = 'Nathan Cockerill' AND "Title" = 'Nano Nits'
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: Who were the directors of the episode 'nano nits' written by nathan cockerill? ### Input: CREATE TABLE table_25687 (
    "Episode Number" text,
    "Title" text,
    "Villains" text,
    "Director" text,
    "Writer" text,
    "Original airdate" text
) ### Response: SELECT "Director" FROM table_25687 WHERE "Writer" = 'Nathan Cockerill' AND "Title" = 'Nano Nits'