With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Hisense used the brand name of Sharp in the 21st century.
text_B: The 2001 South American Rugby Championship was the 23rd edition of the competition of the leading national Rugby Union teams in South America .. South American Rugby Championship. South American Rugby Championship. The tournament wasn ' played in an host country .. Argentina -LRB- that played with the `` Development XV '' -RRB- won the tournament .
not_related.