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Derry, officially Londonderry (), is the second-largest city in Northern Ireland and the...
Coimbra (, also US: , UK: , Portuguese: [kuˈĩbɾɐ] (listen) or [ˈkwĩbɾɐ]) is a city and a...
An aurora (plural: auroras or aurorae), also known as the polar lights or aurora polaris, is a...