With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: South East England is the third largest region of England.
text_B: Ivanpah -LRB- sometimes referred to as Ivanpah I -RRB- was a short-lived silver mining town located in San Bernardino County , California , United States .. United States. United States. California. California. County. List of counties in California. San Bernardino. San Bernardino County, California. mining town. ghost town. San Bernardino County. San Bernardino County, California. It was founded in 1869 and existed until at least the mid-1880s .
not_related.