With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Michael Phelps holds three long course world records for swimming.
text_B: Lago di Sibolla is a lake in the Province of Lucca , Tuscany , Italy .. Province of Lucca. Province of Lucca. Tuscany. Tuscany. lake. lake. Italy. Italy. Its surface area is 0.012 km ² .. Category  : Lakes of Tuscany. Tuscany. Tuscany
not_related.