With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ruth Negga starred in a historical drama.
text_B: Norris Canyon is a census-designated place in Contra Costa County , California .. County. List of counties in California. Contra Costa. Contra Costa County, California. census-designated place. census-designated place. Contra Costa County. Contra Costa County, California. California. California. Norris Canyon sits at an elevation of 1063 feet -LRB- 324 m -RRB- .. The 2010 United States census reported Norris Canyon 's population was 957 .
not_related.