Matches in DBpedia 2014 for { ?s ?p Hohentwiel is an extinct volcano in the Hegau region of Baden-Württemberg in southern Germany The mountain lies to the west of the city of Singen and 20 miles (30 km) from Lake Constance.Hohentwiel began forming, along with the chain of volcanoes in the Hegau region, about 7–8 million years ago, when a layer of volcanic ash and stone was laid down. The magma consists of Phonolite.. }
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- Hohentwiel comment "Hohentwiel is an extinct volcano in the Hegau region of Baden-Württemberg in southern Germany The mountain lies to the west of the city of Singen and 20 miles (30 km) from Lake Constance.Hohentwiel began forming, along with the chain of volcanoes in the Hegau region, about 7–8 million years ago, when a layer of volcanic ash and stone was laid down. The magma consists of Phonolite.".