With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: She was also the traveling chief of staff and former assistant for Clinton during Clinton's campaign for the Democratic nomination in the 2008 presidential election.
text_B: She was also the traveling chief of staff and former assistant for Tim Armstrong during Clinton's campaign for the Democratic nomination in the 2008 presidential election.
contradiction.