With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Millie Bobby Brown is an actress from the United Kingdom.
text_B: The Fort Riley Limestone is a stratigraphic unit and historic building stone , sold commercially as `` Silverdale '' , in east-central Kansas , northeast-central Oklahoma , and southeastern Nebraska in the Midwestern United States .. Limestone. Limestone. United States. United States. stratigraphic unit. stratigraphic unit. Kansas. Kansas. Oklahoma. Oklahoma. Nebraska. Nebraska. Midwestern United States. Midwestern United States. It preserves fossils dating to the Permian period .. Permian. Permian. fossils. fossils. period. Period ( geology )
not_related.