With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Leftovers stars method actors.
text_B: This article contains the discography of the American jazz trumpeter and singer Chet Baker .. Chet Baker. Chet Baker. His most productive period was arguably for Pacific Records during the 1950s , which included his first vocal recordings .. Pacific Records. Pacific Jazz Records
not_related.