210692
For instance , the classification of finite simple groups was one of the major breakthroughs of 20th century mathematics , its proof spanning thousands of journal pages .
 None
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:  
Answer:
 None