claim: South Island is separated from North Island by the Gibraltar Strait.
evidence: Horni Bela -LRB- German Ober Biela -RRB- is a village and municipality -LRB- obec -RRB- in Plzen-North District in the Plzen Region of the Czech Republic .. Region. Regions of the Czech Republic. Plzen. Plzen. District. Districts of the Czech Republic. Plzen-North. Plzen-North District. obec. obec. Plzen-North District. Plzen-North District. Plzen Region. Plzen Region. The municipality covers an area of 18.39 km2 , and has a population of 540 -LRB- as at 3 July 2006 -RRB- .. Horni Bela lies approximately 18 km north-west of Plzen and 87 km west of Prague .. Plzen. Plzen. Prague. Prague