With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: Mascot made a third serial, "The Adventures of Rex and Rinty", but that Rin Tin Tin was not the same dog.
text_B: Mascot made a third serial, "The Adventures of Rex and Rinty", but that Heidegger was not the same dog.
contradiction.