With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: During his second term as an assemblyman, he contested the national House of Councillors election in 1989 as an independent but was defeated.
text_B: During his second term as an assemblyman, he contested the national House of Councillors election in 1980 as an independent but was defeated.
contradiction.