With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Friendship has been studied only in psychology.
text_B: The Legislative districts of Zamboanga City are the representations of the highly urbanized city of Zamboanga in the various national legislatures of the Philippines .. highly urbanized city. Cities of the Philippines#Independent cities. Zamboanga. Zamboanga City. various national legislatures. Template :Philippine legislative periods. Philippines. Philippines. The city is currently represented in the lower house of the Congress of the Philippines through its first and second congressional districts .. Philippines. Philippines. lower house. Philippine House of Representatives. Congress of the Philippines. Congress of the Philippines. first. #1st District. second. #2nd District
not_related.