what is the average foreign imports s tone when the total s tone is 3,157,247 and the foreign exports s ton is less than 358,493?
CREATE TABLE table_43642 (
    "Year" real,
    "U.S. Rank" real,
    "Total s Ton" real,
    "Domestic s Ton" real,
    "Foreign Total s Ton" real,
    "Foreign Imports s Ton" real,
    "Foreign Exports s Ton" real
)
SELECT AVG("Foreign Imports s Ton") FROM table_43642 WHERE "Total s Ton" = '3,157,247' AND "Foreign Exports s Ton" < '358,493'
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 average foreign imports s tone when the total s tone is 3,157,247 and the foreign exports s ton is less than 358,493? ### Input: CREATE TABLE table_43642 (
    "Year" real,
    "U.S. Rank" real,
    "Total s Ton" real,
    "Domestic s Ton" real,
    "Foreign Total s Ton" real,
    "Foreign Imports s Ton" real,
    "Foreign Exports s Ton" real
) ### Response: SELECT AVG("Foreign Imports s Ton") FROM table_43642 WHERE "Total s Ton" = '3,157,247' AND "Foreign Exports s Ton" < '358,493'