With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Joy (entertainer) is part of a K-pop girl group.
text_B: Lexikon fur Theologie und Kirche -LRB- Lexicon of Theology and the Church ; commonly abbreviated LThK -RRB- is a German-language Catholic theological encyclopedia .. German-language. German-language. Catholic. Roman Catholic. Three editions have appeared so far , all published by Herder-Verlag in Freiburg im Breisgau .. Herder-Verlag. Herder publishers. Freiburg im Breisgau. Freiburg im Breisgau
not_related.