What is the in-state area with an outlet of South Platte River and Big Thompson river as the basin?
CREATE TABLE table_name_81 (
    in_state_area VARCHAR,
    outlet VARCHAR,
    basin VARCHAR
)
SELECT in_state_area FROM table_name_81 WHERE outlet = "south platte river" AND basin = "big thompson river"
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 in-state area with an outlet of South Platte River and Big Thompson river as the basin? ### Input: CREATE TABLE table_name_81 (
    in_state_area VARCHAR,
    outlet VARCHAR,
    basin VARCHAR
) ### Response: SELECT in_state_area FROM table_name_81 WHERE outlet = "south platte river" AND basin = "big thompson river"