Task: Question Answering
Input (English): Question: The interruption of the naso-oral airflow accompanied by muscular respiratory efforts that are not sufficient to open the upper airways, constitutes: 
 Options:  <1> The main side effect of electroshock. <2> A symptom of the heroin withdrawal syndrome. <3> An effect of the amnestic syndrome. <4> The apneic episode <5> The acute phase of social phobia.
Output (English): 4