With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Host stars a singer.
text_B: The Tiburon paintbrush or Tiburon Indian paintbrush -LRB- Castilleja neglecta syn .. Castilleja. Castilleja. for Castilleja affinis subsp .. Castilleja. Castilleja. neglecta -RRB- is an endangered taxon of flowering plant in the broomrape family , Orobanchaceae .. Orobanchaceae. Orobanchaceae. endangered taxon. endangered species. It is endemic to the San Francisco Bay Area in California in the United States , where it occurs in Marin , Napa , and Santa Clara Counties .. endemic. Endemism. San Francisco Bay Area. San Francisco Bay Area. California. California. Marin. Marin County, California. Napa. Napa County, California. Santa Clara Counties. Santa Clara County, California. This plant is listed as threatened by the state of California and endangered by the United States government .. California. California
not_related.