With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Vienna is the largest city in Austria, with about one third of the country's population.
text_B: Rodrigo Manrique de Lara -LRB- 1406 -- November 11 , 1476 , Ocana , Spain -RRB- was a rebellious Spanish noble who gained notoriety for his prowess in the Reconquista battles against the Muslim invaders .. Spanish. Spanish people. noble. nobility. Reconquista. Reconquista. He sided with the Infantes of Aragon during their war against John II of Castile and Alvaro de Luna .. Infantes of Aragon. Infantes of Aragon. John II of Castile. John II of Castile. Alvaro de Luna. Alvaro de Luna, Duke of Trujillo. He held the title of the first Count of Paredes de Nava and was the Grand Master of the Order of Santiago for the Kingdom of Castile .. Paredes de Nava. Paredes de Nava. Grand Master. List of Grand Masters of the Order of Santiago. Order of Santiago. Order of Santiago. Kingdom of Castile. Kingdom of Castile
not_related.