With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: He tried to protect Ruyi, Prince Yin of Zhao, his younger half - brother, from being murdered by Empress Dowager Lü.
text_B: He tried to protect Ruyi, Prince Yin of Zhao, his younger half-brother, from being murdered by Empress Dowager Lü, but failed.
neutral.