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Around 1650 Cyrano de Bergerac wrote some fantasy novels in which he described the principle of ascent using a substance ( dew ) he supposed to be lighter than air , and descending by releasing a controlled amount of the substance .
 person: Cyrano de Bergerac
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:
 person: Cyrano de Bergerac