138829
It features the Sixth Doctor , Melanie Bush and Sergeant Benton , and is an exploration both of the origins of the Valeyard and the concept of the Doctor 's role as " Time 's Champion " in the Virgin New Adventures .
 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