Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_8488 ( "Home team" text, "Home team score" text, "Away team" text, "Away team score" text, "Ground" text, "Date" text, "Crowd" real )

### Question ###
What's the average crowd size that had an away score of 15.17 (107)?

### Accurate SQL ###

SELECT AVG("Crowd") FROM table_8488 WHERE "Away team score" = '15.17 (107)'