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Most of the vertebrate fossils of the Two Medicine Formation - a geologic formation known for its duck-billed dinosaur eggs - are preserved by CaCO permineralization .
 location: Two Medicine Formation
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Two Medicine Formation