With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: The family of Vlad , the Impaler died after a conquest .
text_B: Vlad 's father and eldest brother , Mircea , were murdered after John Hunyadi , Regent-Governor of Hungary , invaded Wallachia in 1447 .
REFUTES.