Task: Question Answering
Input (English): Question: A nurse has detected, on different occasions, a real problem in the patients she attends that does not correspond to any of the diagnoses contained in the NANDA classification. The way to proceed so that it can be included in the taxonomy is to propose a structure that contains at least: 
 Options:  <1> The problem. The etiology Signs and symptoms <2> The problem. The etiology Signs and symptoms Studies of the cases and their results. <3> The problem defined. The most common and possible etiologies. Major and minor characteristics that indicate the existence of the problem. At least the results of an experimental study. <4> The label. Definition. Defining characteristics. Related factors Bibliographic support Appropriate interventions and results. <5> The label. Definition. Defining characteristics. Related factors Risk factor's. Bibliographic support Appropriate interventions and results.
Output (English): 4