When semi final (2nd leg) is the round what is the highest attendance?
CREATE TABLE table_30373 (
    "Date" text,
    "Round" text,
    "Opponent" text,
    "Result" text,
    "Venue" text,
    "Scorers" text,
    "Attendance" real,
    "Match Report" text
)
SELECT MAX("Attendance") FROM table_30373 WHERE "Round" = 'Semi Final (2nd leg)'
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: When semi final (2nd leg) is the round what is the highest attendance? ### Input: CREATE TABLE table_30373 (
    "Date" text,
    "Round" text,
    "Opponent" text,
    "Result" text,
    "Venue" text,
    "Scorers" text,
    "Attendance" real,
    "Match Report" text
) ### Response: SELECT MAX("Attendance") FROM table_30373 WHERE "Round" = 'Semi Final (2nd leg)'