With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: WeChat is only an encryption app.
text_B: Technical may refer to  :. Technical -LRB- vehicle -RRB- , a fighting vehicle based on a pickup truck. Technical analysis , a discipline for forecasting the future direction of prices through the study of past market data. Technical analysis. Technical analysis. Technical drawing , also known as drafting. Technical drawing. Technical drawing. Technical death metal , a subgenre of death metal that focuses on complex rhythms , riffs , and song structures. Technical death metal. Technical death metal. Technical foul , an infraction of the rules in basketball usually concerning unsportsmanlike non-contact behavior. Technical foul. Technical foul. Technical rehearsal for a performance , often simply referred to as a `` technical ''. Technical rehearsal. Technical rehearsal. Technical support , a range of services providing assistance with technology products. Technical support. Technical support. Vocational education , often known as `` technical education ''. Vocational education. Vocational education. Legal technicality , an aspect of law. Legal technicality. Legal technicality
not_related.