With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Amazon.com was founded by Jeff Bezos.
text_B: USS Epsilon -LRB- 1864 -RRB- was a tugboat acquired by the Union Navy during the American Civil War .. tugboat. tugboat. Union Navy. Union Navy. American Civil War. American Civil War. She was used by the Union Navy as a tugboat and dispatch boat to support Union Navy patrol vessels on Confederate waterways .. tugboat. tugboat. Union Navy. Union Navy. Confederate. Confederate States of America
not_related.