With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Jaime Lannister is part of the Kingsguard.
text_B: 781 may refer to  :. 781 Kartvelia , a minor planet orbiting the Sun. 781 Kartvelia. 781 Kartvelia. 781 series , a Japanese train type. 781 series. 781 series. 781st Bombardment Squadron , a former United States Air Force unit. 781st Bombardment Squadron. 781st Bombardment Squadron. Area codes 781 and 339 , in the USA. Area codes 781 and 339. Area codes 781 and 339. BOAC Flight 781 , a flight which crashed in 1954. BOAC Flight 781. BOAC Flight 781. Interstate 781 , a highway in the USA. Interstate 781. Interstate 781
not_related.