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Al-Katibi 's logic was largely inspired by the formal Avicennian system of temporal modal logic , but is more elaborate and departs from it in several ways .
 Avicennian system
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Avicennian system