With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Adele's friend posted Adele's demo on YouTube.
text_B: The Altar of Ambition is a 1915 American silent short film directed by Archer MacMackin starring Jack Richardson , Louise Lester , Vivian Rich , Harry von Meter , and David Lythgoe .. Archer MacMackin. Archer MacMackin. Jack Richardson. Jack Richardson ( actor ). Louise Lester. Louise Lester. Vivian Rich. Vivian Rich. Harry von Meter. Harry von Meter. David Lythgoe. David Lythgoe. American. United States. silent. silent film. short film. short film
not_related.