325989
The hypothesis proposes that periods of history , specifically that of Europe during the Early Middle Ages ( AD 614 – 911 ) , did not exist , and that there has been a systematic effort to cover up that fact .
 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