364239
Today 's autograph books are typically found in the hands of children collecting signatures from their favorite cartoon celebrities in amusement park s. History Origin By the beginning of the early modern period , there was a trend among graduating university students of central Europe to have their personal bibles signed by classmates and instructors .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None