With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Machu Picchu is on a mountain ridge 2430 m above sea level.
text_B: Madame l'archiduc is an opera bouffe , or operetta in three acts , by Jacques Offenbach , with a French libretto by Albert Millaud first performed at the Bouffes-Parisiens -LRB- Salle Choiseul -RRB- in Paris in 1874 .. opera bouffe. opera bouffe. operetta. operetta. Jacques Offenbach. Jacques Offenbach. French. French language. Albert Millaud. Albert Millaud. Bouffes-Parisiens. Bouffes-Parisiens. After a slow start Madame l'Archiduc had an opening run of 100 performances .. It was seen in Vienna in 1875 and London in 1876 .. Highlights of the score include the quartet in cod-English for the count , countess and young couple in Act 1 , an ` alphabet ' sextet for Marietta , Giletti and the conspirators in Act 2 , and a polka for the arrival of the dragoons .
not_related.