With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Willie Nelson is on a board.
text_B: The Military history of Angola is marked by a series of conflicts rooted in colonialism and the political mood of the Cold War .. colonialism. colonialism. Cold War. Cold War. During the Cold War , Angola would be involved in struggles against Western powers and South Africa with the help of the Soviet Union and Cuba .. Cold War. Cold War. South Africa. South Africa. Soviet Union. Soviet Union. Cuba. Cuba
not_related.