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Some parts of the caldera have shown uplift due to partial refilling of the magma chamber , for example , pushing Samosir Island and the Uluan Peninsula above the surface of the lake .
 location: Samosir Island; location: Uluan Peninsula
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 location: Samosir Island; location: Uluan Peninsula