With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Machu Picchu is a citadel.
text_B: For the Egyptian author from the Fatimid era , see  : Abu-l-Qasim Ali Ibn al-Sayrafi -LRB- d. 1147 -RRB-. Abu-l-Qasim Ali Ibn al-Sayrafi. Abu-l-Qasim Ali Ibn al-Sayrafi. Yusuf ibn al-Sayrafi -LRB- died c. 557 / 1161 -RRB- was a historian from Al-Andalus , and secretary of the Almoravid sultan Tashfin ibn Ali -LRB- 1143-45 -RRB- .. Al-Andalus. Al-Andalus. Almoravid. Almoravid. Tashfin ibn Ali. Tashfin ibn Ali. al-Sayrafi was born in Granada .. Granada. Granada. He wrote a chronicle on the Almoravids , Al-Anwar al-Jalliya fi akhbar al-dawla al-Murabitiyya in which he dealt with the history of al-Andalus and the Maghreb in general and of his native Granada .. Granada. Granada. Almost nothing of this work has survived , but it is quoted by other historians such as Ibn al-Khatib and ibn Idhari -LRB- especially in his al-Ihata fi akhbar gharnata -RRB- .. Ibn al-Khatib. Ibn al-Khatib. ibn Idhari. ibn Idhari
not_related.