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In the 1990 s , Jürgen Schmidhuber described an algorithmic theory of beauty which takes the subjectivity of the observer into account and postulates : among several observations classified as comparable by a given subjective observer , the aesthetically most pleasing one is the one with the shortest description , given the observer 's previous knowledge and his particular method for encoding the data .
 person: Jürgen Schmidhuber
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: Jürgen Schmidhuber