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.

Example Input: Peculiar nail-changes in a 70-year-old woman with rheumatoid arthritis occurring after approximately 1 year of penicillamine treatment are described.
Example Output: adverse drug event

Example Input: Progressive anemia following combination therapy with interferon-alpha and interleukin-2 in a patient with metastatic renal cell carcinoma.
Example Output: adverse drug event

Example Input: Gold nephropathy.
Example Output:
adverse drug event