With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Novak Djokovic won 31 matches in a row.
text_B: Rileysburg is a small unincorporated community in Highland Township , Vermillion County , in the U.S. state of Indiana .. Indiana. Indiana. County. List of counties in Indiana. Vermillion. Vermillion County, Indiana. Township. List of townships in Indiana. Highland. Highland Township, Vermillion County, Indiana. unincorporated community. Unincorporated area. Highland Township. Highland Township, Vermillion County, Indiana. Vermillion County. Vermillion County, Indiana. U.S. state. U.S. state. The town is served by the post office in Covington in nearby Fountain County .. County. List of counties in Indiana. Covington. Covington, Indiana. Fountain County. Fountain County, Indiana. The county seat is located in Newport .. Newport. Newport, Indiana
not_related.