With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Eddie Vedder is a performer.
text_B: Acoustic tags are small sound-emitting devices that allow the detection and / or remote tracking of fish in three dimensions for fisheries research .. three dimensions. Three-dimensional space. Acoustic telemetry -LRB- including acoustic tags -RRB- are commonly used to monitor the behavior of fish .. Studies can be conducted in lakes , rivers , tributaries , estuaries or at sea .. tributaries. tributaries. estuaries. estuaries. sea. sea. Acoustic tag tracking technology allows researchers to view 3D fish tracks in real-time with sub-meter resolution .. researchers. researchers. Acoustic tags have been employed to help public utility agencies , private firms , and state and federal agencies meet fisheries regulations as defined by the Federal Regulations and Oversight of Energy known as FERC .. Acoustic tags come in an assortment of sizes and weights .. To-date , the smallest acoustic tag successfully employed to provide fish behavior data in three dimensions was approximately 0.65 grams -LRB- tracking a juvenile salmonid at a length of 125 mm -RRB- .. three dimensions. Three-dimensional space. Tag size increases significantly when tracking larger fish for longer periods of time -LRB- i.e. sturgeon -RRB- .
not_related.