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The " bilinear transform " ( also known as " Tustin 's method " ) is used in digital signal processing and discrete-time control theory to transform continuous-time system representations to discrete-time and vice versa .
 person: Tustin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Tustin 
Answer:
 person: Tustin