With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Wars of the Roses involved the Lancasters.
text_B: Uleg-Khem is a traditional Tuvan throat singing song , and was popularized when recorded by the Kronos Quartet in the album `` Early Music -LRB- Lachrymæ Antiquæ -RRB- '' , released in 1997 .. Tuvan throat singing. Tuvan throat singing. Kronos Quartet. Kronos Quartet. Category  : Tuvan music
not_related.