Adverse drug reactions are appreciably harmful or unpleasant reactions resulting from an intervention related to the use of medical products, which predicts hazard from future administration and warrants prevention or specific treatment, or alteration of the dosage regimen, or withdrawal of the product. Given medical case reports extracted from MEDLINE, the task is to classify whether the case report mentions the presence of any adverse drug reaction. Classify your answers into non-adverse drug event and adverse drug event.

Input: Consider Input: Primary CNS lymphoma regressed on withdrawal of MM.

Output: adverse drug event


Input: Consider Input: In December 1998, he applied to our clinic for a follow-up examination.

Output: non-adverse drug event


Input: Consider Input: History revealed that the patient had taken a combination phenolphthalein/docusate sodium (Correctol) over-the-counter laxative 1 day prior to admission.


Output: non-adverse drug event