Which Coefficient has a 2009 10 of 6.166?
CREATE TABLE table_12191 (
    "Rank 2014" real,
    "Rank 2013" text,
    "2009\u201310" text,
    "2010\u201311" text,
    "2011\u201312" text,
    "2012\u201313" text,
    "2013\u201314" text,
    "Coeff." text,
    "Teams" text,
    "CL places" real,
    "EL places" real,
    "Total" real
)
SELECT "Coeff." FROM table_12191 WHERE "2009\u201310" = '6.166'
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: Which Coefficient has a 2009 10 of 6.166? ### Input: CREATE TABLE table_12191 (
    "Rank 2014" real,
    "Rank 2013" text,
    "2009\u201310" text,
    "2010\u201311" text,
    "2011\u201312" text,
    "2012\u201313" text,
    "2013\u201314" text,
    "Coeff." text,
    "Teams" text,
    "CL places" real,
    "EL places" real,
    "Total" real
) ### Response: SELECT "Coeff." FROM table_12191 WHERE "2009\u201310" = '6.166'