With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Stevie Ray Vaughan visited Dallas, Texas.
text_B: For other categories , see List of MeSH codes .. List of MeSH codes. List of MeSH codes. MeSH. MeSH. The following is a list of the `` N '' codes for MeSH .. MeSH. MeSH. It is a product of the United States National Library of Medicine .. United States National Library of Medicine. United States National Library of Medicine. Source for content is here .. -LRB- File `` 2006 MeSH Trees '' . -RRB-. MeSH. MeSH
not_related.