With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lisbon is the capital of the Lisbon District.
text_B: The Aar Dam and its reservoir , the Aartalsee , lie in the upper Aar valley in the German state of Hesse .. Aar. Aar ( Dill ). Aar valley. Aar ( Dill ). Hesse. Hesse. Both are in the municipalities of Bischoffen and Hohenahr in the county of Lahn-Dill-Kreis and about 15 km northwest of the town of Gießen in Hesse .. Lahn-Dill-Kreis. Lahn-Dill-Kreis. Hesse. Hesse. Bischoffen. Bischoffen. Hohenahr. Hohenahr. Gießen. Gießen. Dill. Dill ( river ). On the lakeshores lie the villages of Ahrdt and Mudersbach , both part of the parish of Hohenahr .. Hohenahr. Hohenahr. Ahrdt. Ahrdt. Mudersbach. Mudersbach ( Hohenahr ). Since 1991 the dam has impounded the River Aar , a left-hand tributary of the Dill in the Gladenbach Uplands .. Aar. Aar ( Dill ). Dill. Dill ( river ). Gladenbach Uplands. Gladenbach Uplands. The reservoir is also fed by the Stadterbach , Wilsbach -LRB- into the forebay -RRB- , Weidbach and Meerbach -LRB- into the main reservoir -RRB- .. forebay. forebay ( reservoir )
not_related.