Task: Question Answering
Input (English): Question: Which of the following statements regarding Bipolar II Disorder is true? 
 Options:  <1> The essential feature is a clinical course characterized by one or more manic episodes or mixed episodes. <2> The presence of a manic or mixed episode prevents the diagnosis from being made. <3> Episodes of mood disorder induced by substances or due to medical illness are considered valid to establish the diagnosis of bipolar II disorder. <4> The information that other people offer does not help much to establish the diagnosis. <5> Bipolar II disorder is characterized by the appearance of one or more major depressive episodes accompanied by at least one manic episode.
Output (English): 2