86143
See a [ http://www.wolframalpha.com/input/?i=x%27%27%3D-x solution ] by WolframAlpha .
 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