South Burn (Q7566457)

• matcher place: Orkney Islands (relation 375982), Orkney Islands (relation 3067412)
• view on Wikidata
• Overpass query: show query – Overpass Turbo

  [timeout:300][out:json];
  (
      node(around:1000,58.87770,-3.38277)[fishing][~"^(addr:housenumber|.*name.*)$"~".",i];
      way(around:1000,58.87770,-3.38277)[fishing][~"^(addr:housenumber|.*name.*)$"~".",i];
      rel(around:1000,58.87770,-3.38277)[fishing][~"^(addr:housenumber|.*name.*)$"~".",i];
      node(around:1000,58.87770,-3.38277)[subject][~"^(addr:housenumber|.*name.*)$"~".",i];
      way(around:1000,58.87770,-3.38277)[subject][~"^(addr:housenumber|.*name.*)$"~".",i];
      rel(around:1000,58.87770,-3.38277)[subject][~"^(addr:housenumber|.*name.*)$"~".",i];
      node(around:1000,58.87770,-3.38277)[waterway][~"^(addr:housenumber|.*name.*)$"~".",i];
      way(around:1000,58.87770,-3.38277)[waterway][~"^(addr:housenumber|.*name.*)$"~".",i];
      rel(around:1000,58.87770,-3.38277)[waterway][~"^(addr:housenumber|.*name.*)$"~".",i];
      node(around:1000,58.87770,-3.38277)[leisure=fishing][~"^(addr:housenumber|.*name.*)$"~".",i];
      way(around:1000,58.87770,-3.38277)[leisure=fishing][~"^(addr:housenumber|.*name.*)$"~".",i];
      rel(around:1000,58.87770,-3.38277)[leisure=fishing][~"^(addr:housenumber|.*name.*)$"~".",i];
      node(around:1000,58.87770,-3.38277)[natural=water][name];
      way(around:1000,58.87770,-3.38277)[natural=water][name];
      rel(around:1000,58.87770,-3.38277)[natural=water][name];
      node(around:1000,58.87770,-3.38277)[sport=fishing][~"^(addr:housenumber|.*name.*)$"~".",i];
      way(around:1000,58.87770,-3.38277)[sport=fishing][~"^(addr:housenumber|.*name.*)$"~".",i];
      rel(around:1000,58.87770,-3.38277)[sport=fishing][~"^(addr:housenumber|.*name.*)$"~".",i];
      rel(around:1000,58.87770,-3.38277)[type=waterway][~"^(addr:housenumber|.*name.*)$"~".",i];
  );
  out center tags;

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found a single match candidate

Search criteria from Wikidata

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body of water (Q15324)	natural=water
watercourse (Q355304)	waterway
river (Q4022)	leisure=fishing, type=waterway, waterway=river