355545
As shown by contemporary artwork , the kontos was about 4 metres long , though longer examples may have existed ; later Parthian and Sassanian clibinarii ( Middle Persian : Grivpanvar ) reportedly used kontoi of longer lengths ; only highly trained cavalrymen such as those fielded by the Arsaco-Sassanian dynasties could have used such weapons .
 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