I used the following query: https://api.fda.gov/device/event.json?search=date_received:[20130101+TO+20141231]+AND+device.device_report_product_code=LLZ+AND+adverse_event_flag=Y&limit=1
In the query, adverse_event_flag field was specified as Y. However, the result I got is report number 3363982 with adverse_event_flag=N. Could anyone help me figure out whether my query is wrong?