370027
Plot summary Set in 6th century Europe after Arthur 's death , the novel retells part of Merlin 's life using the Black Book of Carmarthen , Robert de Boron , Geoffrey of Monmouth , and other sources .
 person: Robert de Boron; person: Geoffrey of Monmouth
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: Robert de Boron, Geoffrey of Monmouth 
Answer:
 person: Robert de Boron; person: Geoffrey of Monmouth