Question: What is the inspection ID of the inspection with critical point level, $500 fine, and inspector comment "CDI ON 5-17-10"?
SQL: SELECT T2.inspection_id FROM inspection_point AS T1 INNER JOIN violation AS T2 ON T1.point_id = T2.point_id WHERE T2.fine = 500 AND T1.point_level = 'Critical' AND T2.inspector_comment = 'CDI ON 5-17-10'