With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Linux distributes Arch Linux and is open-source.
text_B: Challwaqucha -LRB- Quechua challwa fish , qucha lake , `` fish lake '' , hispanicized spelling Challhuacocha -RRB- is a lake in the Cusco Region in Peru .. Peru. Peru. Cusco Region. Cusco Region. Quechua. Quechua language. It is situated in the Calca Province , Pisac District .. Calca Province. Calca Province. Pisac District. Pisac District
not_related.