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: Most studies report incidence rates ranging from 1.5 to 3%.
Example Output: non-adverse drug event

Example Input: About three weeks into the therapy regimen, he complained of severe retrosternal chest oppression.
Example Output: non-adverse drug event

Example Input: Short cardiopulmonary resuscitation restored spontaneous circulation and the patient recovered completely.
Example Output:
non-adverse drug event