What's the position when the player was Justin Mapp Category:articles with hcards with a United States nationality?
CREATE TABLE table_77428 (
    "Year" real,
    "Player" text,
    "Position" text,
    "Nationality" text,
    "Team" text
)
SELECT "Position" FROM table_77428 WHERE "Nationality" = 'united states' AND "Player" = 'justin mapp category:articles with hcards'
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's the position when the player was Justin Mapp Category:articles with hcards with a United States nationality? ### Input: CREATE TABLE table_77428 (
    "Year" real,
    "Player" text,
    "Position" text,
    "Nationality" text,
    "Team" text
) ### Response: SELECT "Position" FROM table_77428 WHERE "Nationality" = 'united states' AND "Player" = 'justin mapp category:articles with hcards'