With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Pluto is the biggest trans-Neptunian object by volume that is known.
text_B: The Elkhorn City Railroad Museum is a railroad museum located in Elkhorn City , Kentucky , United States .. Elkhorn City. Elkhorn City, Kentucky. Kentucky. Kentucky. Railroad. Railway museum. railroad museum. Railway museum. United States. United States. The museum was established in 1990 and is dedicated to educating the public on the history of railroads in Kentucky 's Eastern Mountain Coal Fields region .. Kentucky. Kentucky. Eastern Mountain Coal Fields. Eastern Mountain Coal Fields. It is managed by the Elkhorn City Heritage Council .. Elkhorn City. Elkhorn City, Kentucky. More than 1,000 pieces of railroad memorabilia are on display , including two cabooses , velocipedes , motor cars , antique uniforms and equipment .. velocipedes. Handcar
not_related.