Who's the winner in stage 1a, where the leader in the young rider classification is Francesco Casagrande?
CREATE TABLE table_12261714_2 (
    winner VARCHAR,
    young_rider_classification VARCHAR,
    stage VARCHAR
)
SELECT winner FROM table_12261714_2 WHERE young_rider_classification = "Francesco Casagrande" AND stage = "1a"
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: Who's the winner in stage 1a, where the leader in the young rider classification is Francesco Casagrande? ### Input: CREATE TABLE table_12261714_2 (
    winner VARCHAR,
    young_rider_classification VARCHAR,
    stage VARCHAR
) ### Response: SELECT winner FROM table_12261714_2 WHERE young_rider_classification = "Francesco Casagrande" AND stage = "1a"