With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: In 1980, Armadillo World Headquarters closed.
text_B: Armadillo World Headquarters -LRB- sometimes called simply The ` Dillo -RRB- was a music venue and nightclub located in Austin , Texas from 1970 to 1980 .. music venue. music venue. nightclub. nightclub
related.