Database: student_club (difficulty: simple)
Question: How much did the Student_Club members spend on Advertisement in September Meeting?
SQL: SELECT T2.spent FROM event AS T1 INNER JOIN budget AS T2 ON T1.event_id = T2.link_to_event WHERE T1.event_name = 'September Meeting' AND T2.category = 'Advertisement' AND SUBSTR(T1.event_date, 6, 2) = '09'