How many people were in the crowd when the away team scored 15.18 (108)?
CREATE TABLE table_51915 (
    "Home team" text,
    "Home team score" text,
    "Away team" text,
    "Away team score" text,
    "Venue" text,
    "Crowd" real,
    "Date" text
)
SELECT "Crowd" FROM table_51915 WHERE "Away team score" = '15.18 (108)'
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: How many people were in the crowd when the away team scored 15.18 (108)? ### Input: CREATE TABLE table_51915 (
    "Home team" text,
    "Home team score" text,
    "Away team" text,
    "Away team score" text,
    "Venue" text,
    "Crowd" real,
    "Date" text
) ### Response: SELECT "Crowd" FROM table_51915 WHERE "Away team score" = '15.18 (108)'