With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Gabrielle Union began her career in 1991.
text_B: Bear Brook -LRB- also known as Bear Brook Creek -RRB- is a tributary of Roaring Brook in Lackawanna County , Pennsylvania , in the United States .. tributary. tributary. Roaring Brook. Roaring Brook ( Lackawanna River ). It is approximately 3.0 mi long and flows through Madison Township and Moscow .. Madison Township. Madison Township, Lackawanna County, Pennsylvania. Moscow. Moscow, Pennsylvania. The watershed of the stream has an area of 2.26 sqmi .. Wild trout naturally reproduce within it .. The surficial geology in the vicinity of the stream 's lower reaches consists of Wisconsinan Till , Wisconsinan Ice-Contact Stratified Drift , bedrock , and alluvium .. A bridge carrying Pennsylvania Route 690 crosses the stream .
not_related.