What league was involved in 2010?
CREATE TABLE table_21602734_1 (
    league VARCHAR,
    year VARCHAR
)
SELECT league FROM table_21602734_1 WHERE year = 2010
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 league was involved in 2010? ### Input: CREATE TABLE table_21602734_1 (
    league VARCHAR,
    year VARCHAR
) ### Response: SELECT league FROM table_21602734_1 WHERE year = 2010