135542
Duncan also uses the afterword to describe the process that led to the writing of The River Why , and the difficulty finding a publisher .
 person: Duncan
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: Duncan 
Answer:
 person: Duncan