With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tokyo is the capital of a book.
text_B: The Technisches Museum Wien -LRB- German for Vienna Technical Museum -RRB- lies in Vienna -LRB- Austria -RRB- , in Penzing district , on the Mariahilferstraße 212 .. Vienna. Vienna. Austria. Austria. German. German language. Penzing. Penzing ( Vienna ). The decision to establish a technical museum was made in 1908 , construction of the building started in 1909 and the museum was opened in 1918 .. The permanent exhibition categories include  : Nature and Knowledge  : astronomy , principals , physics ; Heavy industry  : mining , iron , steel ; Energy ; Mass production - luxury goods ; Everyday life - directions for use ; Communications and information media ; Musical instruments ; Transport ; Basic Research - A great adventure .
not_related.