Name the most stage for alejandro valverde and astana greg henderson
CREATE TABLE table_22713796_14 (
    stage INTEGER,
    winner VARCHAR,
    general_classification VARCHAR,
    team_classification VARCHAR
)
SELECT MAX(stage) FROM table_22713796_14 WHERE general_classification = "Alejandro Valverde" AND team_classification = "Astana" AND winner = "Greg Henderson"
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: Name the most stage for alejandro valverde and astana greg henderson ### Input: CREATE TABLE table_22713796_14 (
    stage INTEGER,
    winner VARCHAR,
    general_classification VARCHAR,
    team_classification VARCHAR
) ### Response: SELECT MAX(stage) FROM table_22713796_14 WHERE general_classification = "Alejandro Valverde" AND team_classification = "Astana" AND winner = "Greg Henderson"